Surf Forecasts:
Sandy Beach surf forecast from 25 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it for Sandy Beach.
The next couple of weeks are a tough slog. That east-northeast wind isn’t letting up, and it’s putting a cross or cross-onshore chop on everything. The combined swell energy is moderate to strong for the first ten days, roughly from 405 to 1034, but the wind just shreds any chance of clean surf. From Tuesday the 25th of August all the way through to Monday the 7th of September, it’s mostly poor – lumpy, messy, and not worth paddling out. The swell is coming from the ENE and S, but the wind tearing across the surface kills any decent wave face. The few sessions that score a “marginal” rating (like Tuesday morning the 1st of September and Tuesday morning the 8th of September) still have a fresh breeze and cross-chop, so they’re not standouts. The 1st of September morning does have about 7 ft from the east-northeast with a period of 8 seconds and combined energy of 1006 – that’s a lot of water moving, but with that cross wind, it’s a battle, not a joy. The 8th of September morning also has about 7 ft from the east-northeast with a period of 8 seconds and combined energy of 1034, but again, wind is cross.
There’s a long gap after that with almost nothing. By Wednesday the 9th of September, the swell drops right off to about 2 ft from the south with a very long period of 19 seconds, but it’s still cross-shore wind and only 490 energy.
Water temperature: On the first mention here (Sandy Beach), no specific water temp is given in the data, so I can't report an anomaly. But I’ll say it’s likely about average for the time of year based on the lack of a labelled anomaly.
Sandy Beach is exposed to the trade wind direction of east-northeast, which is exactly the direction the wind is coming from – so it’s a mess. This is a beach and reef setup, and with this much cross/onshore wind and moderate-to-strong energy, it looks more interesting for kite surfing than paddle surfing. There is no standout day. The whole 16-day window is mostly a write-off. I’d wait for a change in the pattern.
- Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Fri morning). Mainly strong winds. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | E 7 | ENE 7 | E 7 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 302 | 238 | 274 | 218 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 233 | 276 | 277 | 336 | 433 | 307 | 277 | 229 | 278 | 434 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | ||||||||
Low Tide | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | ||||||||
 | |  | | |  | | | | | | | | | | | | | | | | |
 | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 23 | 24 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 21 | 23 | 21 | 22 | 23 | 23 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 13 | E 13 | S 12 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | S 10 |
| kJ | 85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 225 | 126 | 115 | 102 | 171 | 162 | 199 | 144 | 138 | 51 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | NNE 8 | SSW 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | SSW 12 | S 12 | S 11 | S 11 | S 11 | S 19 |
| kJ | 146 | 81 | 81 | 165 | 135 | 137 | 7 | 47 | 5 | 78 | 109 | 146 | 85 | 89 | 104 | 46 | 69 | 85 | 82 | 55 | 192 |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 6 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | WNW 10 | NNE 8 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSE 12 | ENE 11 | S 20 | ENE 10 | SSW 19 | SSW 14 |
| kJ | 29 | 8 | 109 | 14 | 4 | 50 | 9 | 7 | 24 | 22 | 36 | 56 | 89 | 75 | 188 | 48 | 40 | 30 | 33 | 123 | 79 |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
| kJ | 302 | 238 | 274 | 218 | 188 | 156 | 117 | 155 | 160 | 165 | 177 | 233 | 276 | 277 | 336 | 433 | 307 | 277 | 229 | 278 | 434 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 55 | 47 | 55 | 55 | 47 | 47 | 47 | 47 | 48 | 61 | 47 | 55 | 57 | 48 | 48 | 57 | 47 | 48 | 57 | 16 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy Beach 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 (Sandy Beach) 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 Sandy Beach 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.
Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.
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