Surf Forecasts:
Sandy Beach surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 2AM (local time) - 7ft (2.2m), 12s period, ENE swell with glassy winds.
- Most powerful swell: Saturday 5 Sep, 11PM (local time) - 7.5ft (2.3m), 14s period, ENE swell with 1,970 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 2AM (local time) - 7ft (2.2m), 12s period with ENE swell.
Best Forecast Surf Conditions for Sandy Beach this week:
The surf forecast for Sandy Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 2AM. The primary swell is predicted to be 2.2m and 12s period with a secondary swell of 1.0m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sandy Beach in the next 16 days are 2.3m 14s and forecast to arrive on Saturday (Sep 05) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 11s period and expected on Sunday (Sep 06) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 8th Sep) | 7ft (2.2m) 12s |
| Best Surf | 2AM (Tue 8th Sep) | 7ft (2.2m) 12s |
| Most Powerful | 11PM (Sat 5th Sep) | 7.5ft (2.3m) 14s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Imperial Units
Alright folks, Rusty here. Let’s break down this 16-day window for Sandy Beach.
First week is a tough one. We’ve got a good amount of swell, but the wind is blowing hard from the side or onshore, mostly 19 to 25 mph. That’s gonna make the surface a mess. Water temp is about normal for this time of year.
The first real chance of something decent is Saturday, September 5th. The swell is a solid 7 ft to 7 ft from the ENE, and the period jumps to 13 seconds – that’s proper groundswell energy. The combined energy is strong at 1894, but that wind is still a fresh cross-shore, so it’s gonna be lumpy. It’s marginal, but the best we’ve seen.
Sunday the 6th and Monday the 7th are similar. Still 7 ft to 7 ft of swell with a long 12-13 second period, so plenty of power. The wind eases a little, but it’s still cross-shore or cross-onshore, so expect some chop. The energy is strong, over 2000.
The stand-out window is Tuesday, September 8th. The swell drops to a more manageable 6 ft, but the wind goes light and onshore – that’s a game-changer. The period is a solid 10 seconds. The energy is moderate at 970. With that light wind, the conditions will be at their cleanest. This is your best shot at a decent session. Sandy Beach is a fairly consistent beach and reef spot, so it handles the swell fine, but the light wind is the key.
After that, it’s back to a messy run. The wind picks up again from the 9th, and the swell either gets too small or too junky. The 12th has a possible early morning window with a light onshore breeze and a 5 ft swell (11 seconds), but it’s a long shot.
Overall, for the full 16 days, the only real highlight is that Tuesday the 8th morning. The rest is mostly blown out or tiny. Gotta be picky.
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 Sat morning, min 25°C on Fri morning). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the ENE by Sun night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 12 | E 13 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | E 12 | E 13 | E 12 | ENE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 432 | 464 | 507 | 541 | 456 | 768 | 844 | 711 | 806 | 768 | 574 | 520 | 1561 | 1408 | 1804 | 1687 | 1338 | 1155 | 1657 | 1378 | 1347 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross-on | glassy |
High Tide | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | 8:36AM0.61m | 7:01PM0.22m | 9:55AM0.64m | 9:27PM0.19m | 11:03AM0.68m | 11:10PM0.21m | 12:00PM0.71m | 00:14AM0.26m | 12:48PM0.73m | 1:03AM0.31m | ||||||||
Low Tide | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | 5:18PM0.21m | 1:39AM0.06m | 6:33PM0.16m | 3:03AM0.07m | 7:10PM0.12m | 4:28AM0.06m | 7:41PM0.09m | 5:40AM0.04m | 8:09PM0.07m | ||||||||
 | |  | | |  | | | |  | | | | | | | | | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 24 | 24 | 24 | 23 | 22 | 21 | 20 | 21 | 20 | 20 | 21 | 24 | 24 | 25 | 25 | 25 | 26 | 27 | 26 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | SSE 12 | SSE 12 | S 12 | E 14 | S 12 | SSW 12 | SSW 12 | SSW 11 | SW 11 | SW 11 | E 12 | E 13 | E 12 | ENE 12 |
| kJ | 329 | 314 | 364 | 422 | 318 | 279 | 206 | 283 | 439 | 449 | 472 | 520 | 541 | 497 | 435 | 278 | 360 | 1155 | 1657 | 1378 | 1347 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | S 12 | S 10 | SSE 10 | S 11 | S 11 | SSE 13 | E 12 | E 14 | E 14 | S 11 | E 13 | SW 18 | SSE 11 | S 12 | SW 16 | S 19 | SW 11 | SW 11 | SSW 17 | SSW 15 |
| kJ | 80 | 77 | 35 | 19 | 41 | 37 | 109 | 145 | 260 | 357 | 291 | 507 | 80 | 22 | 26 | 258 | 178 | 268 | 268 | 627 | 481 |
Swell 3 Height (m) Direction Period (s) | S 10 | SW 14 | SW 14 | SW 14 | E 14 | SE 14 | S 10 | S 14 | SW 12 | SW 12 | S 13 | N 11 | NNE 10 | SSW 18 | SSE 10 | SSE 10 | S 12 | SSW 18 | SSW 17 | SW 11 | SW 12 |
| kJ | 30 | 51 | 51 | 30 | 66 | 54 | 18 | 146 | 6 | 6 | 219 | 10 | 20 | 61 | 20 | 19 | 24 | 340 | 486 | 194 | 325 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 13 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | — | — | — | — |
| kJ | 432 | 464 | 507 | 541 | 456 | 768 | 844 | 711 | 806 | 768 | 574 | 392 | 1561 | 1408 | 1804 | 1687 | 1338 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 110 | 47 | 59 | 59 | 110 | 111 | 113 | 63 | 63 | 61 | 48 | 47 | 55 | 16 | 16 | 16 | 16 | 42 | 16 | 0 |
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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