Surf Forecasts:
Thunder surf forecast from 20 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 2AM (local time) - 4.5ft (1.4m), 8s period, SE swell with 274 kJ wave energy.
Best Forecast Surf Conditions for Thunder this week:
The most powerful waves expected at Thunder in the next 16 days are 1.4m 8s and forecast to arrive on Tuesday (Aug 25) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 9s period and expected on Tuesday (Aug 25) at 5AM.
| Wave Type | Time (AST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Tue 25th Aug) | 4.5ft (1.4m) 8s |
Table - best surf conditions forecast for Thunder over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's be straight with you. I've taken a look at the only spot on the cards for this stretch, and the news is a bit of a bummer for the next couple of weeks.
First up, we’re looking at Thunder. This is a sheltered reef break that’s listed as "rarely breaks," so it’s no surprise we’re staring down a long, quiet spell. The pattern for the next 16 days is mostly flat, weak, and wind-affected. There’s a big gap of nothing from the start until Thursday, August 20th, and honestly, even when it does show a little life, it’s not great.
The first real pulse comes through on Thursday morning, August 20th, but it’s barely a whisper. We’re talking a tiny 2ft swell from the ESE with a short 8-second period. The combined energy is a weak 47, and with a 22 mph cross-offshore wind, it’s going to be a messy, blown-out session. Not worth the paddle.
Through that Thursday and into the weekend, the wind stays up, mostly from the E or ENE at 16-22 mph, keeping conditions cross-off. The swell stays small, hovering around 2ft to 3ft, with energy readings in the 50s and 80s. Periods are short, around 8-9 seconds. This is all background junk, not surfable.
The only glimmer in the whole outlook comes on Wednesday, August 26th, and it’s still a marginal call. The swell bumps up to 3ft from the SE, and the wind finally drops—light offshore from the NE at 6 mph. The energy is still weak at 64, but that glassy, clean surface would be the best you’ll see. It’s a tiny, disciplined wave, but if you’re desperate, that’s your window.
Then we hit another dry spell from the end of August into early September. There’s a last gasp on Tuesday, September 2nd, with a 3ft to 4ft SE swell pushing the combined energy into the moderate range (101 to 110). But the wind’s up again at 16 mph from the east, and the period is still a short 8 seconds. It’s a raw, wind-affected wall of water, not a clean wave.
Honestly, for a break that rarely breaks, this run of "poor surf conditions" is pretty normal. The water temp is about average for the time of year, so you won't get any thermal relief either. The only standout here is that Wednesday, August 26th morning, when the wind drops and the surface cleans up. Every other day is a washout.
If you're a kite surfer, the strong cross-off winds on the bigger days might look interesting, but for a paddle surfer, this is a two-week-long wait for a couple of hours of glassy, knee-high slop. The forecasts can change, but right now, I’d hang up the board.
Stay patient,
Rusty
Short Range ForecastModerate rain (total 17mm), heaviest on Fri night. Warm (max 28°C on Thu morning, min 27°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 25mm), heaviest during Mon night. Warm (max 29°C on Tue afternoon, min 27°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 8 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SE 8 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 |
Wave Graph | |||||||||||||||||||
49 | 47 | 49 | 49 | 86 | 54 | 52 | 53 | 53 | 54 | 53 | 50 | 49 | 35 | 40 | 274 | 18 | 109 | 79 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | 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 | off |
High Tide | 10:01AM0.46m | 8:53PM0.62m | 12:17PM0.46m | 10:11PM0.61m | 1:31PM0.49m | 11:36PM0.62m | 2:06PM0.52m | 00:41AM0.65m | 2:32PM0.57m | 1:30AM0.70m | 2:56PM0.61m | 2:11AM0.75m | |||||||
Low Tide | 3:27AM0.24m | 2:14PM0.41m | 4:51AM0.24m | 3:35PM0.44m | 6:09AM0.22m | 5:22PM0.44m | 7:06AM0.19m | 6:36PM0.42m | 7:48AM0.16m | 7:27PM0.38m | 8:23AM0.14m | 8:07PM0.35m | |||||||
— | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | |
6:16 | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:14 | — | — | 6:14 | — | |
mm | 4 | — | — | — | 1 | 2 | 7 | 1 | 2 | 4 | 3 | 1 | — | 5 | 6 | 6 | — | — | — |
Temp °C | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 28 |
Feels °C | 27 | 27 | 26 | 25 | 27 | 27 | 27 | 28 | 28 | 29 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SE 8 | SE 8 | E 8 | E 10 | ENE 10 | SE 8 |
49 | 47 | 49 | 49 | 86 | 54 | 52 | 53 | 53 | 54 | 53 | 50 | 49 | 35 | 35 | 552 | 900 | 556 | 79 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | ESE 12 | ESE 12 | SE 12 | N 8 | N 7 | SE 10 | N 8 | NNE 8 | NNE 8 | N 7 | N 7 | NNE 8 | NNE 8 | SE 9 | NE 11 | — | SE 8 | N 11 |
39 | 30 | 15 | 36 | 10 | 4 | 17 | 5 | 11 | 6 | 4 | 4 | 6 | 7 | 40 | 5 | — | 109 | 2 | |
Swell 3 Height (m) Direction Period (s) | N 8 | N 8 | N 8 | N 8 | — | — | N 7 | N 11 | N 10 | N 10 | N 9 | N 9 | NE 10 | — | — | — | — | N 12 | N 13 |
5 | 5 | 5 | 5 | — | — | 9 | 2 | 2 | 2 | 6 | 6 | 4 | — | — | — | — | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | E 7 | E 7 | ENE 7 | E 7 | E 6 | E 6 | ENE 7 | ENE 6 | E 7 | ENE 7 | SE 8 | SE 8 | E 9 | ENE 9 |
200 | 414 | 336 | 300 | 245 | 277 | 238 | 191 | 171 | 151 | 161 | 191 | 165 | 218 | 337 | 274 | 18 | 680 | 322 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 765 | 871 | 1498 | 765 | 313 | 235 | 259 | 251 | 251 | 251 | 251 | 8 | 259 | 251 | 235 | 313 | 765 | 259 | 259 |
Best forecast wave conditions in Barbados | |||||||||||||||||||
Best forecast wave conditions in Barbados | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











