Surf Forecasts:
Thunder surf forecast from 7 Sep 2026:
- Most powerful swell: Sunday 13 Sep, 2PM (local time) - 3ft (0.9m), 8s period, SE swell with 100 kJ wave energy.
Best Forecast Surf Conditions for Thunder this week:
The most powerful waves expected at Thunder in the next 16 days are 0.9m 8s and forecast to arrive on Sunday (Sep 13) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 8s period and expected on Friday (Sep 11) at 8AM.
| Wave Type | Time (AST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 13th Sep) | 3ft (0.9m) 8s |
Table - best surf conditions forecast for Thunder over the next 16 days.
The Lowdown
Alright, Rusty here, and we’re looking at Thunder for the next couple of weeks. I’ll be honest, it’s a rough one.
Thunder is a reef that rarely breaks, and this forecast is a long, dry spell. There’s no standout day, no window of clean surf. The whole sixteen days is basically a flat or poor run.
From Monday, September 7th, it’s all small and weak. Waves are around 0.7ft to 1ft from the ESE, with a period around 9 seconds. That’s weak, short-period slop with combined energy readings barely hitting 33. The wind is hammering out of the east at 16 to 22 mph – a fresh cross-off breeze – ruining any chance of a clean wave. Tuesday the 8th is the same story before it goes flat with thunderstorms.
Wednesday the 9th starts flat. Thursday the 10th has a measly 0.7ft pulse (energy of 8), then it’s back to nothing. This pattern of tiny, wind-chopped slop or flat conditions runs all the way to Sunday the 14th. On Monday the 14th afternoon, there’s a slight bump to 3ft from the ESE with an 8-second period. The combined energy climbs to 92, but that fresh east wind is still howling.
Into the second week, the biggest swells show up, but it’s still no good. Tuesday the 15th morning sees 3ft from the SE with an 8-second period and moderate energy at 136. Wednesday the 16th morning is similar: 3ft from the SE, 9-second period, energy at 120. But the wind remains a stubborn, fresh easterly cross-off at 16-19 mph. It’s just too windy, and the swell is too short-period to work on this reef. After that, it fades into flatness from Thursday the 17th through to Tuesday the 22nd.
The best of it? If you were really keen, the mornings of Tuesday the 15th and Wednesday the 16th have the most size, just under 3ft. But with that wind and the poor surf conditions label, it’s not worth the paddle. The water temperature is a warm 85°, about average for the time of year.
That’s it. A blank run like this is pretty normal for a spot that rarely breaks like Thunder.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Wed night. Warm (max 28°C on Mon morning, min 27°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Thu morning. Warm (max 28°C on Thu morning, min 27°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 7 | E 7 | E 8 | SE 10 | SE 10 | ESE 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | ESE 9 | ESE 9 | ESE 14 | SE 14 | SE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 32 | 33 | 32 | 32 | 0 | 0 | 0 | 23 | 23 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 32 | 52 | 18 | 7 | 95 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 1:37PM0.61m | 00:51AM0.77m | 2:16PM0.67m | 1:50AM0.82m | 2:50PM0.72m | 2:40AM0.85m | 3:21PM0.76m | 3:26AM0.85m | 3:52PM0.79m | 4:10AM0.82m | 4:22PM0.80m | 4:51AM0.78m | 4:51PM0.79m | ||||||||
Low Tide | 6:46PM0.37m | 7:47AM0.10m | 7:43PM0.31m | 8:31AM0.09m | 8:31PM0.25m | 9:09AM0.11m | 9:15PM0.19m | 9:44AM0.14m | 9:56PM0.15m | 10:17AM0.17m | 10:36PM0.13m | 10:47AM0.22m | 11:16PM0.12m | ||||||||
 |  |  | | |  | | | | | | | |  |  | | | | | | | |
 | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — |
 | — | 6:05 | — | — | 6:04 | — | — | 6:04 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | 1 | — | — | 2 | 3 | — | 1 | 4 | 1 | 1 | 3 | 1 | — | — | — | — | — | — | 1 | — |
Temp °C | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 28 | 28 | 28 | 27 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | NNE 10 | NNE 9 | NNE 12 | NNE 12 | NNE 11 | NE 11 | NE 11 | NNE 10 | NNE 10 | N 9 | N 8 | N 8 | ESE 9 | ESE 9 | N 8 | N 8 | SE 8 |
| kJ | 32 | 33 | 32 | 32 | 55 | 49 | 78 | 78 | 46 | 30 | 29 | 10 | 10 | 6 | 6 | 6 | 32 | 52 | 5 | 4 | 95 |
Swell 2 Height (m) Direction Period (s) | NE 13 | NNE 12 | NNE 11 | NNE 10 | NNE 14 | NE 12 | N 8 | SE 10 | SE 10 | ESE 9 | ESE 10 | N 10 | N 9 | NNE 10 | NNE 10 | NNE 10 | N 8 | ENE 10 | ESE 14 | SE 14 | ESE 13 |
| kJ | 7 | 14 | 23 | 40 | 36 | 40 | 1 | 23 | 23 | 8 | 19 | 2 | 7 | 10 | 9 | 9 | 6 | 20 | 18 | 7 | 16 |
Swell 3 Height (m) Direction Period (s) | N 8 | — | NNE 14 | NNE 14 | — | N 9 | N 8 | N 8 | N 8 | N 8 | N 11 | — | N 13 | N 13 | N 12 | N 12 | NE 9 | N 8 | N 11 | NNE 10 | N 10 |
| kJ | 1 | — | 20 | 18 | — | 2 | 1 | 1 | 1 | 1 | 2 | — | 3 | 3 | 3 | 3 | 3 | 5 | 2 | 9 | 8 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | ENE 8 | E 8 | E 8 | ENE 7 |
| kJ | 162 | 199 | 233 | 233 | 257 | 381 | 413 | 350 | 381 | 412 | 368 | 424 | 471 | 419 | 367 | 315 | 245 | 169 | 260 | 247 | 105 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 848 | 259 | 259 | 848 | 259 | 259 | 848 | 821 | 313 | 765 | 821 | 460 | 848 | 821 | 427 | 848 | 259 | 765 | 848 | 259 | 259 |
Best forecast wave conditions in Barbados | |||||||||||||||||||||
Best forecast wave conditions in Barbados | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thunder surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Thunder Surf forecast
The above surf forecast table for Thunder provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Thunder can be found by selecting the local surf guide option on the grey menu. Our Thunder surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Thunder) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Thunder may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Barbados? If you are looking for accommodation near Thunder, camping, hotels and holiday cottages in Barbados, consider staying in Bridgetown which is 3 km (2 miles) away.
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