Surf Forecasts:
The Rock surf forecast from 4 Aug 2026:
- Most powerful swell: Friday 7 Aug, 11PM (local time) - 5.5ft (1.7m), 17s period, S swell with 1,749 kJ wave energy.
Best Forecast Surf Conditions for The Rock this week:
The most powerful waves expected at The Rock in the next 16 days are 1.7m 17s and forecast to arrive on Friday (Aug 07) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (+0530) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 7th Aug) | 5.5ft (1.7m) 17s |
Table - best surf conditions forecast for The Rock over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
The Rock is the only spot on the radar for this 16-day window, and it’s a mixed bag. We’ve got a solid, long-period SSW groundswell running through the first week, but the wind is a problem. For the most part, it’s a moderate cross-shore breeze, which leaves a bit of a chop on the surface. The water is about average for this time of year.
Tuesday the 4th is the pick of the early days. The afternoon sees a 4ft SSW swell with a 16-second period, and the wind turns cross-offshore, cleaning it up. The wave energy is strong (1255), so there’s plenty of push. It’s a reef break, and that long period will help shape it up nicely. You’ll want to be a competent surfer, but it’s not a total washout for a keen beginner. Remember, it’s a fairly consistent spot, so expect a few others out there.
The rest of the first week is stubborn. The swell stays in the 3ft to 5ft range, but that persistent cross-wind keeps things a bit messy. Wednesday morning through Friday is a write-off with that cross-chop. Sunday afternoon the 9th offers a 4ft S swell, but the period drops to 12 seconds, losing some of that grunt.
The second week gets weaker. From Monday the 11th onward, the energy drops off. Swell drops under 3ft, and the wind stays cross or cross-onshore. By Thursday the 13th, it’s truly poor, with the energy falling to a weak 595 (combined energy). The end of the run, from the 19th, shows a little bump in swell again, but it’s still marginal.
So, the one true standout is Tuesday afternoon the 4th. Get out there if you can. Otherwise, it’s a long wait for the next decent window.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Tue morning. Warm (max 28°C on Wed afternoon, min 25°C on Tue afternoon). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 53mm), heaviest during Thu night. Warm (max 27°C on Fri morning, min 26°C on Thu night). Mainly fresh winds. | ||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | W 10 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | S 18 | S 14 | S 17 | S 16 | SSW 15 | S 16 | SSW 16 | S 12 | S 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 578 | 561 | 813 | 596 | 666 | 959 | 817 | 1244 | 768 | 730 | 431 | 813 | 819 | 1029 | 711 | 724 | 350 | 456 | 464 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 5:24AM0.51m | 5:13PM0.44m | 5:58AM0.49m | 5:39PM0.39m | 6:40AM0.45m | 6:06PM0.33m | 7:44AM0.41m | 6:33PM0.27m | 10:22AM0.39m | 00:30AM0.27m | 12:22PM0.43m | 1:20AM0.33m | |||||||
Low Tide | 11:00PM0.02m | 11:28AM0.12m | 11:25PM0.05m | 12:06PM0.16m | 11:51PM0.09m | 12:58PM0.21m | 00:21AM0.14m | 2:59PM0.26m | 1:08AM0.20m | 7:02PM0.21m | 5:06AM0.22m | 7:27PM0.15m | |||||||
 |  |  |  | | | | | |  | | | | | | | | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:23 | — | — | 6:23 | — | — | 6:23 | — |
mm | 4 | 3 | — | 2 | 2 | 2 | 5 | 2 | 3 | 9 | 2 | 2 | 6 | 5 | 6 | 11 | 6 | 6 | 7 |
Temp °C | 26 | 27 | 26 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 26 | 27 | 26 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 26 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | W 10 | SSW 16 | SSW 16 | W 9 | SSW 15 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | S 14 | S 14 | S 12 | S 16 | SSW 15 | S 16 | S 11 | S 12 | S 12 |
| kJ | 459 | 561 | 813 | 318 | 666 | 959 | 817 | 1244 | 768 | 730 | 423 | 813 | 446 | 1029 | 711 | 724 | 269 | 456 | 464 |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SSW 13 | S 8 | SSW 15 | SSW 21 | SSW 14 | SSW 15 | S 10 | S 10 | S 10 | S 11 | S 18 | S 17 | S 11 | S 11 | S 11 | SSW 16 | SSW 14 | SSW 16 |
| kJ | 534 | 133 | 41 | 596 | 566 | 443 | 413 | 89 | 174 | 174 | 184 | 521 | 819 | 229 | 182 | 319 | 350 | 276 | 421 |
Swell 3 Height (m) Direction Period (s) | S 8 | S 8 | S 24 | S 9 | S 14 | S 7 | S 10 | — | — | S 20 | S 18 | — | WNW 11 | — | S 18 | — | S 13 | S 18 | SSW 24 |
| kJ | 58 | 42 | 44 | 39 | 4 | 8 | 90 | — | — | 198 | 431 | — | 25 | — | 224 | — | 166 | 225 | 189 |
Wind waves Height (m) Direction Period (s) | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 7 | W 7 | W 6 | W 6 |
| kJ | 578 | 400 | 357 | 476 | 368 | 333 | 327 | 382 | 392 | 345 | 285 | 268 | 247 | 273 | 265 | 264 | 226 | 158 | 161 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 186 | 15 | 192 | 186 | 160 | 193 | 186 | 192 | 193 | 192 | 186 | 193 | 193 | 193 | 193 | 193 | 192 | 192 |
Best forecast wave conditions in West Sri Lanka | |||||||||||||||||||
Best forecast wave conditions in Sri Lanka | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 The Rock 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 The Rock Surf forecast
The above surf forecast table for The Rock provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Rock can be found by selecting the local surf guide option on the grey menu. Our The Rock 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 (The Rock) 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 The Rock 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.
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