Surf Forecasts:
The Rock surf forecast from 8 Sep 2026:
- Most powerful swell: Saturday 12 Sep, 11AM (local time) - 6ft (1.9m), 17s period, SSW swell with 2,137 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 1.9m 17s and forecast to arrive on Saturday (Sep 12) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (+0530) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sat 12th Sep) | 6ft (1.9m) 17s |
Table - best surf conditions forecast for The Rock over the next 16 days.
The Lowdown
Alright mate, it’s a grim picture for The Rock. The whole 16-day forecast is dominated by cross-onshore winds and choppy conditions, so don’t get your hopes up. The water’s a warm 84°, which is a touch above average for the season.
The first time you might even consider getting wet is Thursday, September 13th. Swell’s running about 5 ft from the SSW with a long 16-second period – that’s proper groundswell energy, combined energy hitting 1317. But the wind is still cross-onshore at 12 mph, meaning chop. Not a standout, just the least worst option. The real bright spot comes on Monday, September 21st in the afternoon. You get a 5 ft SSW swell, 14-second period, combined energy of 1480, and the wind drops to a light 9 mph cross-shore. That’s the cleanest window – only a slight cross-chop. The Rock is a reef break, fairly consistent, and the SSW direction lines up nicely. Crowds can show sometimes, so keep an eye out.
Everything else is pretty much write-offs. The afternoon of September 14th throws up an 8 ft SW swell with a short 8-second period, cross-shore but lumpy (1576) – that’s for experts only. The morning of September 12th sees 6 ft SSW at 17 seconds, combined energy 2344, but it’s cross-onshore 15 mph and choppy. That setup looks more interesting for kite surfing than a clean surf. After the 23rd, it’s small and blown out. If you’re set on paddling out, aim for that Monday 21st afternoon. It’s the only half-decent session on offer.
Rusty
Short Range ForecastHeavy rain (total 44mm), heaviest during Tue night. Warm (max 28°C on Tue morning, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 46mm), heaviest during Sun afternoon. Warm (max 29°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 17 | S 18 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 19 | SSW 17 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SW 8 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 298 | 273 | 314 | 242 | 213 | 376 | 1375 | 1201 | 1195 | 911 | 651 | 1513 | 2137 | 2113 | 1655 | 1224 | 1121 | 773 | 834 | 794 | 795 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on |
High Tide | 1:09PM0.46m | 1:44AM0.45m | 1:38PM0.50m | 2:08AM0.51m | 2:04PM0.52m | 2:32AM0.56m | 2:30PM0.54m | 2:56AM0.58m | 2:55PM0.54m | 3:20AM0.59m | 3:19PM0.53m | 3:42AM0.59m | 3:42PM0.51m | 4:03AM0.56m | |||||||
Low Tide | 7:33PM0.08m | 7:37AM0.11m | 7:54PM0.03m | 8:07AM0.07m | 8:17PM-0.01m | 8:34AM0.04m | 8:40PM-0.03m | 9:01AM0.03m | 9:02PM-0.04m | 9:26AM0.03m | 9:24PM-0.03m | 9:49AM0.04m | 9:45PM-0.00m | ||||||||
 | |  | | | | |  | | | | | | | | |  | | | | | |
 | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 6:12 | — | — | 6:10 | — | — | 6:10 | — | — | 6:09 | — | — | 6:09 | — | — | 6:08 | — | — | 6:08 | — |
mm | 3 | 4 | 13 | 6 | 6 | 8 | 2 | — | 2 | 2 | 2 | 6 | 3 | 2 | 9 | 3 | 8 | 11 | 5 | 6 | 8 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 27 | 27 | 27 |
Feels °C | 30 | 29 | 29 | 30 | 29 | 30 | 29 | 28 | 28 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 28 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 10 | S 9 | SSE 9 | SSE 10 | S 18 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 16 | SSW 17 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 9 |
| kJ | 164 | 142 | 148 | 104 | 92 | 131 | 1375 | 1201 | 1195 | 911 | 651 | 1025 | 2137 | 2113 | 1655 | 1224 | 1121 | 773 | 834 | 575 | 268 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 17 | SSW 26 | SSE 9 | SSW 24 | SSW 21 | SSW 21 | SSW 19 | SE 9 | SE 9 | SSE 9 | SSE 10 | WSW 9 | S 18 | SSW 14 | SSW 14 | SSW 15 |
| kJ | 298 | 273 | 314 | 242 | 213 | 376 | 66 | 46 | 218 | 871 | 511 | 1513 | 84 | 84 | 17 | 18 | 31 | 235 | 332 | 207 | 795 |
Swell 3 Height (m) Direction Period (s) | SW 12 | WSW 8 | SSW 12 | SSE 10 | S 18 | SSW 13 | SSE 14 | SSW 25 | SSE 14 | SE 9 | S 10 | SE 9 | — | — | — | WSW 10 | SSW 20 | SSE 9 | SE 9 | — | S 24 |
| kJ | 39 | 23 | 29 | 65 | 163 | 141 | 20 | 63 | 36 | 19 | 67 | 125 | — | — | — | 10 | 38 | 52 | 20 | — | 11 |
Wind waves Height (m) Direction Period (s) | W 9 | W 5 | W 5 | W 5 | W 5 | W 5 | W 5 | W 5 | W 6 | W 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 6 | WSW 6 | SW 8 | SW 8 | SW 8 | WSW 8 |
| kJ | 99 | 31 | 33 | 27 | 26 | 19 | 28 | 29 | 49 | 50 | 52 | 81 | 123 | 104 | 116 | 65 | 77 | 499 | 833 | 794 | 554 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 669 | 763 | 764 | 192 | 875 | 193 | 669 | 875 | 193 | 192 | 875 | 193 | 193 | 875 | 147 | 192 | 875 | 193 | 669 | 192 | 193 |
Best forecast wave conditions in West Sri Lanka | |||||||||||||||||||||
Best forecast wave conditions in Sri Lanka | |||||||||||||||||||||
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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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