Surf Forecasts:
Sandy Beach surf forecast from 5 Sep 2026:
- Most powerful swell: Friday 4 Sep, 11PM (local time) - 7ft (2.1m), 14s period, E swell with 1,832 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 2.1m 14s and forecast to arrive on Friday (Sep 04) 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 3.5m 14s period and expected on Monday (Sep 07) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 4th Sep) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let’s break it down in feet and miles.
First off, Sandy Beach is looking rough. The water’s around 81°, which is about normal for the season, but the wind is a mess – cross-shore and cross-onshore, making everything lumpy and choppy.
The first day with any chance is Saturday, September 6th, but it’s not worth getting wet. From Sunday, September 7th through the end of the first week, it’s just poor. The combined energy is moderate to strong, but it’s all wind-screwed. The wind is moderate to fresh, and the surf is chopped up.
There’s a long gap of several days with nothing good. The only real standout, and I’m being generous, is Saturday, September 19th. The wind drops to a light breeze, about 6 mph, and we’ve got a 8ft east-northeast swell at 9 seconds. It’s cross-shore, so it might clean up a bit. The combined energy is strong. The swell direction is east-northeast, not the preferred southeast, but it’s the best we’ve got. This one is for the intermediate surfer who’s keen. Crowds are likely, so you won’t be alone.
The rest of the second week is weak, with swell dropping to 3-3ft but with a long period of 16-20 seconds from the SSW. That’s a groundswell, but it’s small and the wind is still messy. The beach break won’t hold it well. Honestly, you’d be better off with a kiteboard in this cross-shore wind.
So, to sum it up: Saturday, September 19th is your only real shot. It’s not pretty, but it’s the best of a bad lot. The rest of the 16 days is a bust.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sun night. Warm (max 27°C on Mon morning, min 25°C on Fri afternoon). Winds decreasing (fresh winds from the ENE on Fri afternoon, light winds from the ESE by Sun night). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Mon afternoon. Warm (max 27°C on Mon afternoon, min 25°C on Wed night). Winds increasing (light winds from the SSE on Tue night, fresh winds from the ENE by Wed night). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 14 | E 14 | E 13 | ENE 13 | E 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | ENE 13 | ENE 12 | ENE 11 | ENE 10 | SSW 14 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 577 | 1807 | 1465 | 1474 | 1538 | 1100 | 960 | 1200 | 1344 | 1379 | 1102 | 802 | 530 | 289 | 273 | 204 | 242 | 321 | 281 | 249 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross-on | on | on | cross-on | cross-on | on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 9:27PM0.19m | 11:03AM0.68m | 11:10PM0.21m | 12:00PM0.71m | 00:14AM0.26m | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | |||||||
Low Tide | 6:33PM0.16m | 3:03AM0.07m | 7:10PM0.12m | 4:28AM0.06m | 7:41PM0.09m | 5:40AM0.04m | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | 8:25AM0.05m | 9:26PM0.04m | |||||||
 |  | | |  |  |  |  |  | |  | | |  |  | | | | | | |
 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | 10 | 2 | 2 | 4 | 2 | 2 | 1 | 1 | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 22 | 24 | 24 | 24 | 25 | 25 | 24 | 28 | 27 | 27 | 28 | 28 | 31 | 28 | 25 | 24 | 22 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | E 14 | S 12 | S 12 | SSW 12 | E 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | SW 15 | SW 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | E 12 | SSW 13 | E 12 | ENE 7 |
| kJ | 577 | 504 | 647 | 569 | 1538 | 1100 | 960 | 1200 | 1344 | 3059 | 2963 | 802 | 530 | 261 | 169 | 146 | 146 | 131 | 139 | 249 |
Swell 2 Height (m) Direction Period (s) | S 11 | N 11 | SSW 18 | SW 18 | SSW 12 | SSW 12 | SSW 11 | SSW 14 | SW 14 | ENE 13 | ENE 12 | W 11 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | E 12 | SSW 12 | E 12 |
| kJ | 244 | 10 | 62 | 79 | 404 | 368 | 408 | 1057 | 1536 | 1379 | 1102 | 658 | 313 | 140 | 273 | 204 | 133 | 104 | 89 | 144 |
Swell 3 Height (m) Direction Period (s) | S 13 | SSW 20 | NNE 10 | NNE 10 | SSW 16 | SSW 16 | SW 15 | S 18 | SSW 17 | S 8 | SSW 15 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | SSW 8 | SSW 16 | SW 18 | SW 16 |
| kJ | 280 | 38 | 20 | 19 | 166 | 223 | 236 | 243 | 492 | 127 | 512 | 474 | 175 | 289 | 225 | 166 | 45 | 181 | 154 | 211 |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 14 | E 13 | ENE 13 | ENE 13 | — | — | — | — | SSE 8 | SSW 12 | SSW 9 | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | — |
| kJ | 328 | 1807 | 1465 | 1474 | 816 | — | — | — | — | 270 | 3566 | 567 | — | — | — | — | 242 | 321 | 281 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 55 | 47 | 47 | 48 | 16 | 47 | 16 | 5 | 42 | 42 | 57 | 57 | 5 | 5 | 20 | 47 | 47 | 47 | 55 | 20 |
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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