Weekly Energy Market Report: 31st Aug - 4th Sept 2026
SMART ENERGY
Weekly Energy Briefing · UK
Week of 31 Aug – 4 Sept 2026 Latest settlement: 3 September 2026
Weekly review · Week 36 · 31 Aug – 4 Sept 2026
The week in review: gas firmed 6.2%, power firmed 5.7%
A day-by-day recap of how UK gas and electricity moved across the trading week of 31 Aug – 4 Sept 2026, and where that leaves businesses approaching renewal.
Bigger picture
Still high over the six months held
Key risk
Us–iran military escalation
The week in review
How the week actually moved
Not one day's snapshot — the whole week, day by day. Each line traces the front-month close from Monday to Friday, so you see the shape
of the week, not just where it ended.
Week of 31 Aug – 4 Sept 2026
Natural gas
The week in 5 days · p/therm
↑ 6.23%
vs last week
rose early, eased into Friday · +8.0% Mon→Fri
Week avg
175.81 Week low
164.82 Week high
182.15
low 96.52Fri close · today ●182.15 high
Electricity
The week in 5 days · £/MWh
↑ 5.65%
vs last week
rose early, eased into Friday · +8.3% Mon→Fri
Week avg
137.18 Week low
129.38 Week high
141.56
low 82.28Fri close · today ●141.56 high
What matters
One week rarely changes a renewal decision
The shape:
a week that fell then bounced tells you more than the net number.
Wider view:
the 6-month charts below show whether this week is a blip or a trend.
For buyers:
a good week doesn't reset your deadline — your contract end date still drives urgency.
Biggest move of the weekWin-27
gas ↑ 9.73%
— the largest week-on-week swing across every contract we track.
Why prices moved
Forces pulling prices in both directions
A balanced view is more useful than a single prediction. These are the main influences in the latest report.
Pressure pulling prices lower
Wind generation volatile but adequate
Wind generation across the UK and North West Europe has remained well above average—UK wind at 12.18 GW on Friday, German wind at 22.74 GW mid-week—providing some offset to the tightness in thermal and nuclear. However, wind is expected to ease over the weekend before recovering into next week.
Risks that could push prices higher
Us–iran military escalation
American strikes on Iranian targets over the weekend and early week, followed by Iranian retaliation with missiles and drones, raised concerns over potential disruption to Middle East oil and gas supply. Brent crude approached $92/barrel and the Strait of Hormuz—a critical chokepoint for global energy trade—came into focus as a risk. The escalation provided the primary driver for the week's rally.
European storage remains tight
EU gas storage stands at 65.4%, some 22.6 percentage points below the five-year seasonal average. Regulation requires member states to reach 90% by 1 November, leaving a tight 60-day injection window that requires approximately 4,510 GWh per day on average. This structural tightness continues to underpin prices.
Uk nuclear availability tightening
UK nuclear output is expected to fall from current levels of around 4.95 GW to approximately 3.6 GW during September, tightening the baseload supply picture as the market heads into the autumn and winter.
French hydroelectric shortfall
Record-low rainfall across France is restricting hydroelectric output and deepening an ongoing drought. French power contracts have moved particularly sharply, with summer 2027 contracts up 24% week-on-week, reflecting the tightness in the generation picture.
German generation outage
On Tuesday evening, 4.2 GW of generation capacity in North Rhine was taken offline following an incident described by grid operator Amprion as externally caused. This contributed to the sharp move in German power prices and carbon allowances, which climbed €1.30 per tonne of CO2 equivalent.
6-month direction
Was this week a blip or a trend?
The week-on-week number tells you the direction; these 6-month lines tell you whether it's part of a bigger move. Each tracks a rolling maturity — the near-term price, the next winter and the year ahead — so nothing breaks as contracts roll off. Hover for the value on any day.
Gas forward prices
Rolling maturities · p/therm
Near-term (Oct-26)
Next winter (Win-26)
Year ahead (Cal-27)
Each line is a rolling maturity — the near-term line always follows the current front month, so it never breaks as contracts roll off.
Power forward prices
Rolling maturities · £/MWh
Near-term (Oct-26)
Next winter (Win-26)
Year ahead (Cal-27)
Power tends to track gas; the chart shows how far the recent move has carried.
Your renewal window
Guidance grouped by how soon your contract ends
Timing urgency comes from your deadline; the market view comes from the forward contracts covering each renewal's supply period. Open your band for separate gas and electricity evidence.
Timing and value are different.
Wholesale prices are currently rising. If your contract ends within three months, still get live quotes now — your decision window is shortening. Later renewals have more time to monitor the market.
1–3 monthsOctober–December 2026
Oct 2026Nov 2026Dec 2026
Get live quotes now
Gas is up 5.3–9.7% this week and up 28.5–33.7% over 30 days; electricity up 4.9–8% this week, up 21.6–24.5% over 30 days.
⌄
Evidence confidenceMedium
⚠ December leans on Cal-27 only, so it has less seasonal visibility.
Your deadline creates the urgency. Use the current move to compare live supplier quotes now, but don't treat one falling day as proof the market has reached its bottom.
4–6 monthsJanuary–March 2027
Jan 2027Feb 2027Mar 2027
Review and compare
Gas is up 5.4–9.7% this week and up 30.2–33.7% over 30 days; electricity up 5–8% this week, up 21.7–24.5% over 30 days.
⌄
Evidence confidenceMedium
GasNear the top
Rising
This week
Up 5.4–9.7% 30 days
Up 30.2–33.7%
low 57.84Sum-27 · today ●121.51 high
Evidence:
Q1-27, Sum-27, Win-27
ElectricityNear the top
Rising
This week
Up 5–8% 30 days
Up 21.7–24.5%
low 59.74Sum-27 · today ●99.56 high
Evidence:
Q1-27, Sum-27, Win-27
What this means
Start reviewing the market and compare 12-, 24- and 36-month options. You have time for a considered decision, so weigh the certainty each term buys rather than chasing a perfect day.
7–9 monthsApril–June 2027
Apr 2027May 2027Jun 2027
Prepare and monitor
Gas is up 6–9.7% this week and up 17.1–33.9% over 30 days; electricity up 5.1–8% this week, up 12.9–22.4% over 30 days.
⌄
Evidence confidenceMedium
GasNear the top
Rising
This week
Up 6–9.7% 30 days
Up 17.1–33.9%
low 65.81Win-27 · today ●118.00 high
Evidence:
Q2-27, Sum-27, Win-27, Sum-28
ElectricityNear the top
Rising
This week
Up 5.1–8% 30 days
Up 12.9–22.4%
low 74.51Win-27 · today ●100.22 high
Evidence:
Q2-27, Sum-27, Win-27, Cal-28
What this means
Get usage and site details ready, monitor the relevant forward contracts and use indicative quotes to understand the range. No need to force a decision while visibility is adequate.
10–12 monthsJuly–September 2027
Jul 2027Aug 2027Sep 2027
Plan ahead and watch
Gas is up 6–9.7% this week and up 17.1–33.7% over 30 days; electricity up 5.1–8% this week, up 12.9–22.1% over 30 days.
⌄
Evidence confidenceMedium
GasNear the top
Rising
This week
Up 6–9.7% 30 days
Up 17.1–33.7%
low 65.81Win-27 · today ●118.00 high
Evidence:
Sum-27, Win-27, Sum-28
ElectricityNear the top
Rising
This week
Up 5.1–8% 30 days
Up 12.9–22.1%
low 74.51Win-27 · today ●100.22 high
Evidence:
Sum-27, Win-27, Cal-28
What this means
Plan your procurement timetable and stay informed. Far-dated products can hide seasonal detail, so a firm buy-or-wait instruction would be false precision at this stage.
The honest read
Gas and power are not moving together. That makes any single read of the market less reliable.
And wholesale is only part of a quote — non-energy charges, credit, volume and shape all move the final rate. The practical decision is how much further movement your business can tolerate before its contract deadline.
If prices ease further
Wind, milder weather and diplomacy help
If the US–Iran situation de-escalates and military action ceases, the geopolitical risk premium could unwind quickly; additionally, if temperatures remain above seasonal norms and wind generation stays strong, the near-term pressure on power could ease, and if LNG arrivals to Europe accelerate, storage tightness could loosen.
If prices rise again
Low storage leaves little cushion
If US–Iran tensions escalate further or shipping through the Strait of Hormuz is disrupted, geopolitical risk premium could push prices higher still; alternatively, if European storage injection speeds fail to meet targets and LNG arrivals disappoint, the structural tightness could intensify prices heading into winter.
Fixing buys budget certainty. It does not prove that a business has predicted the market correctly.
Where the week ended across every contract — kept for readers who want the detail.
Open gas and electricity forward tables Monthly, quarterly, seasonal and annual contracts · week-ending close
View data ⌄
Gas
p/therm
Contract
Price
Day
Week
30d
Oct-26
month
177.99
↓ 2.28%
↑ 5.64%
↑ 29.66%
Nov-26
month
181.08
↓ 2.30%
↑ 5.49%
↑ 28.54%
Dec-26
month
182.51
↓ 2.27%
↑ 5.27%
—
Q4-26
quarter
180.52
↓ 2.28%
↑ 5.46%
↑ 28.87%
Q1-27
quarter
176.33
↓ 2.12%
↑ 5.39%
↑ 31.53%
Q2-27
quarter
124.17
↓ 1.58%
↑ 9.33%
↑ 33.92%
Win-26
season
178.45
↓ 2.20%
↑ 5.43%
↑ 30.16%
Sum-27
season
119.56
↓ 1.60%
↑ 9.52%
↑ 33.69%
Win-27
season
115.87
↓ 1.80%
↑ 9.73%
↑ 30.16%
Sum-28
season
77.86
↓ 1.72%
↑ 5.97%
↑ 17.14%
Cal-27
calendar
132.88
↓ 1.81%
↑ 8.26%
↑ 32.39%
Cal-28
calendar
88.61
↓ 1.78%
↑ 6.96%
↑ 20.23%
Cal-29
calendar
72.94
↓ 1.19%
↑ 5.39%
↑ 9.29%
Electricity
£/MWh
Contract
Price
Day
Week
30d
Oct-26
month
140.07
↓ 1.05%
↑ 6.79%
↑ 25.23%
Nov-26
month
149.60
↓ 1.12%
↑ 5.59%
↑ 21.64%
Dec-26
month
148.22
↓ 1.19%
↑ 4.90%
—
Q4-26
quarter
145.92
↓ 1.13%
↑ 5.74%
↑ 22.80%
Q1-27
quarter
144.16
↓ 1.91%
↑ 4.97%
↑ 24.53%
Q2-27
quarter
101.05
↓ 1.22%
↑ 6.60%
↑ 22.41%
Win-26
season
145.05
↓ 1.51%
↑ 5.36%
↑ 23.65%
Sum-27
season
98.32
↓ 1.25%
↑ 6.58%
↑ 22.12%
Win-27
season
99.35
↓ 0.87%
↑ 7.99%
↑ 21.69%
Cal-27
calendar
110.39
↓ 1.38%
↑ 6.38%
↑ 24.17%
Cal-28
calendar
79.12
↓ 0.75%
↑ 5.08%
↑ 12.88%
Cal-29
calendar
70.32
↓ 0.57%
↑ 1.60%
↑ 6.92%
Fixed-term choices
Contract length is a risk decision, not a forecast
No term protects against every outcome. Weigh the certainty the business wants against how soon it is willing to return to the market.
12
months
More flexibility if markets fall, but the business returns to the market sooner.
Shorter budget certainty
Earlier exposure to the next renewal
Useful where flexibility matters most
24
months
A middle ground between price certainty and revisiting the market.
Two-year budgeting
Less frequent procurement
Still allows a medium-term review
36
months
Greater certainty, but a longer commitment if markets later fall.
Longest budget protection
Reduced exposure to near-term shocks
Higher opportunity cost if prices drop
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Gas 6.8% w/w, power 5.6% w/w.","gasSignal":"PRICES RISING","powerSignal":"PRICES RISING"},"moves":{"daily":{"gas_pct":-1.92,"power_pct":-1.16},"weekly":{"gas_pct":6.76,"power_pct":5.63},"monthly":{"gas_pct":27.13,"power_pct":20.73}},"spot":{"gas_price":175.5,"gas_change_pct":null,"power_price":72.76,"power_change_pct":null},"reference":{"contract":"Sum-27","gas_price":119.56,"power_price":98.32,"gas_day_pct":-1.605,"gas_week_pct":9.52,"gas_30d_pct":33.691,"power_day_pct":-1.245,"power_week_pct":6.58,"power_30d_pct":22.121},"front_month":{"key":"oct26","label":"Oct-26","gas":{"price":177.99,"day_pct":-2.284,"week_pct":5.64,"m30_pct":29.655,"trend":"rising","streak":{"dir":"down","days":1},"range_30d":{"low":128.5,"high":182.15,"position":0.922},"net_pct":29.7},"power":{"price":140.07,"day_pct":-1.053,"week_pct":6.79,"m30_pct":25.23,"trend":"rising","streak":{"dir":"down","days":1},"range_30d":{"low":106.07,"high":141.56,"position":0.958},"net_pct":25.2}},"windows":[{"key":"oct26","label":"Oct-26","context":"In the next 1–3 months","horizon_rank":0,"is_front":true,"stance":"review","note":"October gas and power are now sitting near the top of their 30-day range, having climbed 29.7% and 25.2% respectively since late August. Both peaked mid-week and eased slightly Friday, but the month-long trend is firmly upward and the cheaper window that existed a month ago has closed. If you renew in the next 1–3 months, reviewing live quotes now is prudent; waiting is a bet that prices will fall, which is possible but not the direction the market is signalling.","gas":{"price":177.99,"day_pct":-2.284,"week_pct":5.64,"m30_pct":29.655,"trend":"rising","streak":{"dir":"down","days":1},"range_30d":{"low":128.5,"high":182.15,"position":0.922},"net_pct":29.7},"power":{"price":140.07,"day_pct":-1.053,"week_pct":6.79,"m30_pct":25.23,"trend":"rising","streak":{"dir":"down","days":1},"range_30d":{"low":106.07,"high":141.56,"position":0.958},"net_pct":25.2}}],"spotlight":{"contract":"oct26","label":"Oct-26","fuel":"gas","metric":"30d","value":29.655,"dir":"up","trend":"rising","text":"October gas has climbed 29.7% over the past month and sits near its highest level in the records we hold, having briefly touched 182.15 p/therm mid-week. The rally was driven by Middle East geopolitical tensions and tight European storage, and whilst the market eased slightly Friday, the underlying pressure remains. Anyone renewing in the next quarter is seeing rates significantly higher than they would have a month ago."},"narrative":{"headline":"Gas and power both climbed hard this week on Middle East tensions; near-term contracts now near their highest in months.","summary":"Both fuels rose 6–9% week-on-week, driven by US–Iran escalation and tight European storage. The rally peaked mid-week, then eased slightly Friday, but prices remain elevated. Anyone renewing in the next three months is seeing sharply higher rates than a month ago.","verdict":"If you renew in the next quarter, the cheaper window has closed; if you're not renewing until 2027 or beyond, there is no rush yet.","trend_read":{"gas":"Gas has kept climbing over the past month, rising 29.7% since late August, and today sits near the top of that range. This week it climbed steadily for two days, peaked mid-week, then eased back on Friday—but the net move is firmly upward and the month-long trend shows no reversal.","power":"Power has also risen 25.2% over the past month and sits near its high. Like gas, it climbed for two days this week, peaked mid-week, then pulled back slightly Friday, but the underlying direction over 30 days is clearly upward and the near-term contracts have moved harder than the far-dated ones."},"scenario":{"upside":"If US–Iran tensions escalate further or shipping through the Strait of Hormuz is disrupted, geopolitical risk premium could push prices higher still; alternatively, if European storage injection speeds fail to meet targets and LNG arrivals disappoint, the structural tightness could intensify prices heading into winter.","downside":"If the US–Iran situation de-escalates and military action ceases, the geopolitical risk premium could unwind quickly; additionally, if temperatures remain above seasonal norms and wind generation stays strong, the near-term pressure on power could ease, and if LNG arrivals to Europe accelerate, storage tightness could loosen."},"drivers":[{"title":"US–IRAN MILITARY ESCALATION","body":"American strikes on Iranian targets over the weekend and early week, followed by Iranian retaliation with missiles and drones, raised concerns over potential disruption to Middle East oil and gas supply. Brent crude approached $92/barrel and the Strait of Hormuz—a critical chokepoint for global energy trade—came into focus as a risk. The escalation provided the primary driver for the week's rally.","tone":"up","outlook":"mixed","soWhat":"Geopolitical risk premiums can fade quickly if tensions ease, but they can also persist if the situation worsens; watch for any further military action or shipping disruptions."},{"title":"EUROPEAN STORAGE REMAINS TIGHT","body":"EU gas storage stands at 65.4%, some 22.6 percentage points below the five-year seasonal average. Regulation requires member states to reach 90% by 1 November, leaving a tight 60-day injection window that requires approximately 4,510 GWh per day on average. This structural tightness continues to underpin prices.","tone":"up","outlook":"sticks","soWhat":"Storage tightness is a longer-lasting factor; it will support prices through the injection season and into winter unless LNG arrivals accelerate significantly."},{"title":"UK NUCLEAR AVAILABILITY TIGHTENING","body":"UK nuclear output is expected to fall from current levels of around 4.95 GW to approximately 3.6 GW during September, tightening the baseload supply picture as the market heads into the autumn and winter.","tone":"up","outlook":"sticks","soWhat":"Lower nuclear availability is a seasonal pattern; it will persist through the coming months and support power prices, particularly if wind generation eases."},{"title":"FRENCH HYDROELECTRIC SHORTFALL","body":"Record-low rainfall across France is restricting hydroelectric output and deepening an ongoing drought. French power contracts have moved particularly sharply, with summer 2027 contracts up 24% week-on-week, reflecting the tightness in the generation picture.","tone":"up","outlook":"mixed","soWhat":"Drought is weather-dependent; if rainfall returns to normal, hydro output will recover and ease some of the continental pressure, but if it persists, French prices will remain elevated."},{"title":"GERMAN GENERATION OUTAGE","body":"On Tuesday evening, 4.2 GW of generation capacity in North Rhine was taken offline following an incident described by grid operator Amprion as externally caused. This contributed to the sharp move in German power prices and carbon allowances, which climbed €1.30 per tonne of CO2 equivalent.","tone":"up","outlook":"fades","soWhat":"A single outage is typically temporary; if the plant returns to service quickly, the pressure it added will ease, though the underlying tightness from storage and nuclear will remain."},{"title":"WIND GENERATION VOLATILE BUT ADEQUATE","body":"Wind generation across the UK and North West Europe has remained well above average—UK wind at 12.18 GW on Friday, German wind at 22.74 GW mid-week—providing some offset to the tightness in thermal and nuclear. However, wind is expected to ease over the weekend before recovering into next week.","tone":"down","outlook":"mixed","soWhat":"Wind is volatile and seasonal; periods of strong generation provide temporary relief, but the underlying tightness in storage and nuclear means any easing of wind will quickly tighten the market 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Thomas McGlynn leads Smart Energy Company’s
commercial energy strategy and contributes to its Market Desk.
His specialist areas include business energy procurement,
wholesale market timing, supplier and billing disputes,
metering and kVA. His analysis forms part of the wider
Smart Energy Company advisory service supporting businesses
across the UK.
