
Surf Forecasts:
Sandy Beach surf forecast from 3 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 21ft (6.5m), 14s period, SSW swell with onshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 21ft (6.5m), 14s period, SSW swell with 16,463 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 8PM (local time) - 21ft (6.5m), 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 Monday (Sep 07) at 8PM. The primary swell is predicted to be 6.5m and 14s period with a secondary swell of 2.2m and 12s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Sandy Beach in the next 16 days are 6.5m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 11s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 7th Sep) | 21ft (6.5m) 14s |
| Best Surf | 8PM (Mon 7th Sep) | 21ft (6.5m) 14s |
| Most Powerful | 8PM (Mon 7th Sep) | 21ft (6.5m) 14s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for Sandy Beach over the next couple of weeks. I’ll be straight with you – it’s a rough start. The first few days are a write-off with strong cross-shore winds and messy, lumpy conditions. You’d be battling more than surfing. We’re talking about a solid 7ft to 8ft of short-period wind swell, but it’s just no good with that wind tearing it apart.
The combined swell energy is moderate at best early on, hitting around 947 to 1316, but it’s all for nothing with that onshore mess. You’ll have to wait it out.
Now, there’s a little window of hope on the morning of Wednesday the 9th of September. The wind drops right off to almost nothing, going glassy, and the swell drops to a clean 3ft from the SSW with a long 14-second period. The combined energy is only 514, so it’s not a big day, but with glassy conditions, that’s your best chance for a smooth, fun session. It’s a standout for quality, but it’s small.
After that, the wind kicks back in and we’re back to lumpy cross-shore chop for days. The swell picks up again, but it’s just not clean.
Then, heading into the second week, on Monday the 14th of September, the swell gets big. We’re looking at 12ft from the ENE with a 10 to 11-second period. The combined energy jumps to 2326 and 3000. The wind is moderate cross-shore, and the forecast actually says it’s too big for this break. This is expert-only territory, and even then, it’s a beast. For most of us, it’s a day to watch from the sand.
The rest of the week is more of the same: big, messy, onshore. Honestly, the only real standout is that glassy Wednesday morning. The rest of the 16-day window is a slog of cross-shore winds and lumpy surf. If you’re a beginner, steer clear of anything over 5ft, and it’s all over that for most of the period. The water temperature is about average for this time of year, so no surprises there.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 25°C on Thu morning). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 36mm), heaviest during Sun afternoon. Warm (max 27°C on Mon afternoon, min 24°C on Sun night). Winds decreasing (near gales from the SSE on Mon night, calm by Tue night). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 7 | ENE 7 | ENE 7 | ENE 7 | E 14 | E 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | SSW 14 | SSW 15 | SSW 15 | SSW 10 | S 9 | SSW 15 | SSW 14 | SSW 14 | E 14 | E 13 |
Wave Graph | |||||||||||||||||||||
512 | 512 | 443 | 498 | 577 | 775 | 1831 | 1616 | 1750 | 1568 | 1535 | 2277 | 4096 | 10643 | 2210 | 641 | 376 | 289 | 273 | 232 | 225 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | glassy | cross | cross | cross |
High Tide | 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 | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | |||||||
Low Tide | 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 | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | ||||||||
6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | |
— | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | |
mm | — | — | — | — | — | — | — | — | — | 2 | 7 | 12 | 2 | 3 | 8 | 2 | — | — | 2 | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 |
Feels °C | 22 | 21 | 20 | 20 | 20 | 21 | 24 | 24 | 25 | 26 | 25 | 23 | 24 | 27 | 22 | 27 | 29 | 31 | 30 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | S 15 | SSE 12 | S 13 | S 12 | E 14 | E 14 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 13 | SSW 14 | SSW 15 | SSW 15 | WSW 11 | S 9 | S 9 | SSW 9 | ENE 8 | ENE 7 | E 13 |
209 | 226 | 345 | 423 | 577 | 775 | 469 | 547 | 579 | 1003 | 1306 | 2277 | 4096 | 10643 | 1164 | 641 | 325 | 158 | 142 | 147 | 225 | |
Swell 2 Height (m) Direction Period (s) | E 13 | S 14 | E 14 | E 14 | S 12 | S 12 | SW 18 | SSW 18 | SSW 16 | SSE 10 | SSE 10 | N 9 | NW 15 | ENE 13 | ENE 12 | ENE 11 | ENE 10 | ENE 8 | SSW 8 | SSW 13 | SSW 13 |
162 | 200 | 334 | 357 | 423 | 400 | 78 | 120 | 288 | 19 | 18 | 7 | 8 | 1946 | 950 | 460 | 258 | 173 | 90 | 204 | 176 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | E 12 | SW 18 | SW 18 | SW 13 | N 11 | NNE 10 | NNE 10 | SSE 9 | SSE 10 | N 10 | N 9 | — | — | SSW 15 | W 8 | SSW 15 | SSW 14 | SSW 14 | E 14 | SSW 8 |
94 | 145 | 12 | 12 | 27 | 10 | 20 | 19 | 9 | 19 | 8 | 7 | — | — | 402 | 163 | 376 | 289 | 273 | 232 | 34 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | SSE 7 | SSW 10 | — | — | — | — | — | ENE 7 |
512 | 512 | 443 | 498 | 456 | 346 | 1831 | 1616 | 1750 | 1568 | 1535 | 1649 | 2090 | 703 | 2210 | — | — | — | — | — | 199 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 59 | 111 | 55 | 59 | 111 | 47 | 47 | 110 | 18 | 47 | 42 | 57 | 113 | 108 | 136 | 5 | 3 | 0 | 17 | 47 | 47 |
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.










