Surf Forecasts:
Sandy Beach surf forecast from 7 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 15ft (4.5m), 13s period, SSW swell with 6,954 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period with SSW 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 Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.2m and 10s. Another secondary swell of 0.9m and 8s is also forecast. 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 4.5m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 15s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Best Surf | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Most Powerful | 2AM (Tue 8th Sep) | 15ft (4.5m) 13s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s be straight with you – this stretch at Sandy Beach (Oahu) is a tough one. The whole 16-day forecast is a write-off for good paddle surfing. We’ve got a long dry spell ahead, with no real windows of clean, rideable waves. The water temp is sitting at 81°F, which is pretty much average for this time of year, nothing unusual there.
The first few days, starting Monday the 7th, are a mess. There’s a risk of thunderstorms, and the wind is howling out of the east at 16 mph, cross-on, making things choppy and ugly. Swell height is around 5 ft from the east, but with that wind, it’s a total no-go. The combined wave energy is a massive 1223 (strong), but it’s all for nothing with that wind. This continues through Tuesday and Wednesday, with the wind staying onshore or cross-on, gusting up to 22 mph. The water is a lumpy, cross-chop mess.
We see a bit of a drop in swell on Thursday and Friday, but the wind doesn't let up, staying cross-shore or cross-on, and the wave comment is consistently "poor surf conditions." The swell period is short, around 7-11 seconds, which doesn't help. By the weekend, the wind is still a problem, and the swell is small and weak.
The second week is no better. A strong breeze from the east-northeast cranks up to 25 mph from the 17th onwards, pushing messy, lumpy swell in the 8 ft to 8 ft range. The combined wave energy is often over 1000, but with that wind, it’s just a washing machine. This window is completely blown out.
Forget about a paddle board. With this much wind, and Sandy Beach being a beach and reef setup, this is a full-on kite-surfing situation. The conditions are consistent for that, but for a surfer looking for a clean wave, there’s nothing on offer. The forecast is a blank run for the entire 16 days, and honestly, for this area, that’s a pretty normal pattern when the trades are this strong.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Mon morning. Warm (max 27°C on Mon morning, min 26°C on Mon morning). Winds decreasing (strong winds from the SSE on Mon night, calm by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu afternoon). Mainly fresh winds. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 12 | E 12 | SSW 13 | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 11 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | NE 8 | SSW 15 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1670 | 672 | 6954 | 959 | 608 | 378 | 269 | 257 | 177 | 203 | 197 | 140 | 119 | 313 | 240 | 163 | 128 | 115 | 74 | 84 | 80 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross |
High Tide | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | 4:10PM0.44m | ||||||||
Low Tide | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | 8:25AM0.05m | 9:26PM0.04m | 9:14AM0.08m | 9:49PM0.03m | 10:05AM0.12m | 10:11PM0.04m | 10:58AM0.16m | 10:34PM0.05m | ||||||||
 | |  | |  |  |  |  |  | | | | | | | | |  | | | | |
 | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
mm | 6 | 6 | 9 | 2 | — | — | 2 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 27 | 28 | 25 | 26 | 27 | 31 | 32 | 29 | 30 | 26 | 23 | 24 | 24 | 24 | 25 | 25 | 26 | 25 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 14 | ENE 12 | W 11 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | ENE 7 | E 11 | ENE 7 | SW 15 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | NE 8 | NE 9 | NE 8 |
| kJ | 488 | 1999 | 1302 | 935 | 422 | 378 | 165 | 140 | 177 | 141 | 197 | 93 | 105 | 229 | 240 | 163 | 128 | 115 | 74 | 59 | 58 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | E 12 | SSW 15 | ENE 11 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | SW 16 | SW 16 | NNE 8 | SW 15 | NE 8 | NE 9 | NE 9 | E 5 | ENE 9 | SSW 14 |
| kJ | 104 | 672 | 581 | 870 | 608 | 137 | 269 | 257 | 156 | 131 | 101 | 211 | 261 | 22 | 226 | 74 | 79 | 77 | 19 | 31 | 80 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | S 8 | NNW 12 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | SSW 13 | SSW 16 | SSW 13 | SW 10 | E 11 | SW 9 | NNE 7 | SW 15 | SW 16 | SSW 13 | ENE 9 | SSW 15 | ENE 8 |
| kJ | 454 | 173 | 15 | 474 | 235 | 356 | 168 | 166 | 176 | 181 | 127 | 51 | 119 | 29 | 26 | 242 | 124 | 68 | 47 | 84 | 14 |
Wind waves Height (m) Direction Period (s) | ENE 12 | ENE 8 | SSW 13 | SSW 10 | — | — | — | — | SE 4 | ENE 7 | — | ENE 7 | — | ENE 11 | — | — | — | — | — | E 5 | ENE 4 |
| kJ | 1670 | 395 | 6954 | 959 | — | — | — | — | 7 | 203 | — | 140 | — | 313 | — | — | — | — | — | 12 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 234 | 108 | 110 | 126 | 7 | 3 | 5 | 14 | 14 | 47 | 16 | 16 | 16 | 16 | 16 | 42 | 16 | 16 | 47 | 16 | 5 |
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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