
Surf Forecasts:
Sandy Beach surf forecast from 4 Sep 2026:
- Most powerful swell: Friday 4 Sep, 11PM (local time) - 7ft (2.2m), 14s period, E swell with 2,005 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 2.2m 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 4.0m 14s period and expected on Monday (Sep 07) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 4th Sep) | 7ft (2.2m) 14s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
G’day, it’s Rusty. Look, I’ve gotta be straight with you — the next couple of weeks at Sandy Beach are a bit of a grind. The surf’s not totally flat, but the conditions just won’t line up for a decent paddle. We’re looking at a long stretch of cross-shore and onshore winds churning things up, plus the swell direction is mostly from the ENE when the optimum for this break is ESE. It’s frustrating, because there’s some real energy in the water at times, but it’s just messy.
The first real chance to even consider a surf kicks off on Saturday the 5th, but even then it’s marginal. The morning sees a 8ft ENE swell with a 13-second period, so there’s plenty of power behind it — the combined energy is moderate-high at 2489 — but the wind is a fresh cross-shore from the ENE at 19 mph, which is gonna leave it lumpy and hard to enjoy. Water temps are around 81°, which is pretty much average for this time of year.
Saturday afternoon and Sunday the 6th are similar — still pumping with 7ft to 7ft ENE swell and energy in the 2000s, but the wind stays on it, and Sunday swings cross-onshore with a risk of thunderstorms. Not your day.
Monday the 7th through to Wednesday the 9th keep that pattern going: 6ft to 8ft ENE swell, lots of energy, but cross-shore to cross-onshore winds in the 12-19 mph range. The water’s choppy and messy. This setup is more appealing for kite surfing than for paddle surfing, if I’m honest.
Thursday the 10th drops off — the swell dips to 5ft with a short 7-second period, and the wind cranks up to a strong breeze at 25 mph from the ENE. That’s a write-off.
From Friday the 11th through to around Tuesday the 16th, the swell hangs around 6ft to 8ft, mostly from the ENE with periods between 8 and 12 seconds. The combined energy bounces around — some sessions show moderate figures like 474, others like 1370 are stronger — but the wind stays cross-shore, never glassy or offshore. A few of the afternoons get a score of 2 out of 10, which means “marginal,” but nothing you’d drive for.
Then into the second week, from Wednesday the 17th of September onward, the swell drops right off — down to 3ft to 3ft from the SSW, with longer periods of 16 to 17 seconds. That’s a proper long-period groundswell, which at a beach-and-reef setup like Sandy Beach can break too straight and be tricky. The combined energy drops to under 1000, which is weak compared to what we saw earlier, and the wind is still cross-shore at 12 to 16 mph. Again, marginal at best.
Honestly, there’s not one standout day in this whole 16-day window. The only time you might get something half-decent is if the tide lines up on one of those “marginal” afternoons around the 15th or 16th, but with that constant cross-wind, it’s hard to get excited. The best advice? Keep the board in the car and wait for a change in the pattern — it tends not to stay this poor for long around here, and forecasts can shift.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Sun night. Warm (max 26°C on Fri morning, min 25°C on Fri morning). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the E by Sun night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Mon morning. Warm (max 27°C on Mon morning, min 25°C on Wed night). Winds increasing (light winds from the E on Tue night, fresh winds from the ENE by Wed night). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | S 12 | E 14 | E 14 | ENE 13 | ENE 13 | E 13 | ENE 12 | SSW 14 | SSW 14 | ENE 13 | ENE 13 | ENE 12 | ENE 11 | ENE 10 | SSW 14 | SSW 14 | E 13 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph | |||||||||||||||||||||
521 | 577 | 1977 | 1792 | 1616 | 1538 | 1240 | 1382 | 1960 | 1844 | 1697 | 1121 | 773 | 462 | 356 | 273 | 222 | 279 | 247 | 229 | 296 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 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 | 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 | ||||||||
6:13 | — | — | 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 | — | — | — | — | — | — | — | 6 | 11 | 2 | 2 | 1 | — | 2 | 1 | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 22 | 22 | 21 | 24 | 23 | 25 | 24 | 25 | 25 | 28 | 27 | 27 | 28 | 29 | 31 | 27 | 25 | 25 | 23 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | S 12 | E 14 | S 13 | S 12 | SSW 12 | SSW 12 | SSW 13 | ENE 12 | SSW 14 | SW 15 | SW 14 | WSW 11 | ENE 11 | ENE 10 | ENE 9 | SSW 14 | E 13 | E 13 | E 12 | E 13 | ENE 13 |
521 | 577 | 643 | 565 | 794 | 718 | 980 | 1338 | 1960 | 4187 | 6058 | 1027 | 773 | 462 | 216 | 273 | 222 | 212 | 196 | 229 | 282 | |
Swell 2 Height (m) Direction Period (s) | E 14 | S 11 | N 11 | SSW 17 | NNE 10 | NNE 9 | SW 16 | SSW 14 | S 18 | ENE 13 | ENE 13 | ENE 12 | SSW 9 | SSW 8 | SSW 14 | E 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 16 |
357 | 244 | 10 | 112 | 19 | 15 | 129 | 1382 | 240 | 1844 | 1697 | 1121 | 371 | 232 | 356 | 232 | 204 | 133 | 131 | 89 | 175 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | S 13 | SSW 20 | NNE 10 | S 22 | SSE 10 | SSW 20 | SSE 10 | N 9 | SSW 17 | SSW 16 | SSW 15 | W 10 | SSW 14 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SW 16 | SW 18 | SSW 12 |
6 | 280 | 38 | 20 | 9 | 19 | 76 | 19 | 7 | 367 | 694 | 505 | 320 | 371 | 83 | 44 | 30 | 16 | 133 | 155 | 47 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | E 14 | ENE 13 | ENE 13 | E 13 | ENE 12 | — | ENE 12 | — | — | S 10 | — | — | — | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
443 | 366 | 1977 | 1792 | 1616 | 1538 | 1240 | — | 1643 | — | — | 783 | — | — | — | 192 | 142 | 279 | 247 | 218 | 296 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 59 | 55 | 47 | 47 | 47 | 47 | 49 | 19 | 20 | 42 | 108 | 57 | 5 | 3 | 5 | 16 | 19 | 47 | 48 | 50 | 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.










