Surf Forecasts:
Sandy Beach surf forecast from 25 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 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 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 14s period and expected on Monday (Aug 31) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
G’day, I’m Rusty. Look, I’ll be straight with you—this stretch of coastline is staring down the barrel of a pretty grim run as far as proper surf goes. The whole 16-day window is filled with messy, wind-affected waves, and the only real flicker of hope comes right at the very end. You’re gonna have to wait a while for anything worth paddling out for.
Let’s talk about Sandy Beach. The water is sitting at 81°F, which is about average for this time of year, so that’s not gonna be your problem. The problem is the wind. For the first week and a half, it’s all cross-shore or cross-onshore from the ENE, blowing anywhere from 19 mph to 25 mph. That’s just flattening everything out and making it lumpy. The swell is all over the shop—short-period, wind-driven junk from the east at 5 ft to 7 ft, with combined energy pushing into the moderate range (562 to 861). But it’s not doing you any favours. The wave comment is consistently “poor surf conditions,” and the scores are zero. It’s a beach-and-reef setup, so honestly, with that much wind and that poor quality, it’s looking more interesting for kite surfing than paddle surfing.
There’s a short gap around the 2nd and 3rd of September where things get a bit more interesting. On the morning of the 3rd, we get a light offshore wind from the ESE at only 3 mph, with a 4 ft swell from the east at a period of 13 seconds. That’s a groundswell, and the combined energy is 820 (moderate). The wind is glassy, and it’s the only time in the whole window the wind is truly offshore. It’s a marginal call, but it’s the best you’ll see. The break is fairly consistent, but crowds are often a problem here, so expect company. The swell direction is E, which is a bit off the optimum ESE, but it’s close enough.
After that, it’s back to the same old story for another week—cross-shore winds, lumpy chop, and poor conditions. The swell picks up again from the 5th of September onward, with some bigger pulses from the ENE hitting 6 ft and periods climbing to 11–12 seconds. The combined energy gets strong (1078 to 1621), but the wind stays cross-shore or cross-onshore, so the quality just isn’t there. The best of the bunch is the morning of the 6th of September—a 6 ft swell from the ENE at 12 seconds, with moderate cross-shore wind. The combined energy is 1621 (strong), and the wave comment is “marginal surf forecast or questionable tide conditions.” It’s not a standout, but it’s the only other time you might get a wave that’s not completely terrible. The period is long enough to have some shape, but at a beach break, it could be a bit straight.
The true standout here is the morning of the 3rd of September. That’s your best bet for a clean, offshore session with a bit of groundswell. But it’s a long way off, and the forecast could change.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue afternoon). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Fri morning, min 25°C on Fri morning). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | E 7 | E 7 | E 7 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph | |||||||||||||||||||||
326 | 255 | 236 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 225 | 216 | 257 | 326 | 217 | 218 | 256 | 204 | 218 | 447 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | ||||||||
Low Tide | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 |
Feels °C | 24 | 23 | 23 | 21 | 21 | 22 | 23 | 22 | 22 | 23 | 22 | 22 | 22 | 21 | 22 | 22 | 22 | 22 | 23 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 10 |
85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 225 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 53 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | N 8 | SSW 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | E 11 | SSW 16 | S 11 | S 11 | S 11 | S 19 |
146 | 81 | 81 | 165 | 135 | 137 | 6 | 47 | 10 | 78 | 109 | 148 | 121 | 89 | 104 | 63 | 162 | 59 | 82 | 82 | 190 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 11 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | WNW 10 | W 10 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSW 12 | E 11 | ENE 11 | ENE 10 | ENE 10 | SW 14 |
29 | 24 | 109 | 14 | 4 | 50 | 9 | 7 | 24 | 22 | 36 | 56 | 89 | 75 | 188 | 46 | 62 | 38 | 33 | 31 | 49 | |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
326 | 255 | 236 | 213 | 188 | 182 | 145 | 170 | 144 | 167 | 164 | 189 | 216 | 257 | 326 | 217 | 218 | 256 | 204 | 218 | 447 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 55 | 47 | 50 | 50 | 47 | 48 | 48 | 47 | 47 | 59 | 47 | 49 | 55 | 47 | 47 | 55 | 47 | 55 | 57 | 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.











