Surf Forecasts:
Sandy Beach surf forecast from 5 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 11PM (local time) - 7ft (2.1m), 7s period, E swell with 439 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 7s and forecast to arrive on Saturday (Aug 08) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 15s period and expected on Wednesday (Aug 05) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 8th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here again. Look, I’ve gone through the full 16 days for Sandy Beach, and there’s nothing good to report. The spot is usually fairly consistent, and the best swell direction is from the ESE, but the wind and waves just don’t cooperate at any point.
The whole run starts with poor surf conditions on Tuesday, August 4th, and it stays that way right through to Wednesday, August 19th. The wind is cross-shore from the ENE or NE the whole time, building from a moderate breeze to a fresh breeze, and later a strong breeze. It’s creating a lumpy cross-chop or a messy cross-chop, and the surface is never clean.
Early on, the swell is small, from 1ft down to 0.4ft, but it’s all poor. The swell builds around August 8th, with heights hitting 2ft, and the combined energy getting into the moderate range (357 on the 8th morning, then 569 on the 9th morning). But the wind is still cross-shore and fresh, so it’s a mess.
In the second week, the swell gets big. On August 17th, the swell is 3ft, and by August 18th it’s 4ft, with combined energy readings over 1700 – that’s strong to very strong. But the wind is still a strong breeze from the ENE, cross-shore, and the period is short, around 8-9 seconds. At over 2.5m (8ft), it’s only for experts, and with the wind and chop, it’s not even good for them. This setup looks more interesting for kite surfing than paddle surfing.
There’s a small window on August 11th and 12th when the swell shifts to SSW and S with a very long period of 15-18 seconds, and the combined energy is strong (577 then 866). But the swell height is only 0.7ft to 0.9ft, and the wind is still cross-shore and fresh. Long period swells like that are better on a point or reef, but here it’s just not working.
The water temperature on the first day is 80°F, with a tiny anomaly, so it’s average for the time of year.
No standouts. This is a long blank run, and for this spot, it’s not that unusual. It won’t stay poor forever, and forecasts can change, but for now, there’s nothing to chase.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue afternoon, min 24°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Mon morning. Warm (max 26°C on Sat afternoon, min 24°C on Sat night). Mainly strong winds. | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 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) | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 6 | SSW 14 | ENE 8 | SSW 14 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 436 | 358 | 253 | 188 | 86 | 81 | 80 | 107 | 77 | 77 | 165 | 226 | 227 | 432 | 314 | 319 | 305 | 276 | 240 | 259 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 6:26PM0.37m | 9:10AM0.55m | 7:10PM0.29m | 10:22AM0.61m | 8:39PM0.22m | 11:25AM0.67m | 10:36PM0.19m | 12:21PM0.73m | 00:00AM0.20m | 1:10PM0.77m | 1:01AM0.23m | 1:55PM0.79m | 1:52AM0.27m | |||||||
Low Tide | 2:07PM0.27m | 1:37AM0.03m | 4:33PM0.27m | 2:24AM0.02m | 6:43PM0.21m | 3:25AM0.02m | 7:38PM0.16m | 4:32AM0.00m | 8:16PM0.11m | 5:38AM-0.02m | 8:50PM0.08m | 6:37AM-0.03m | 9:21PM0.06m | |||||||
 |  | |  | |  | | | | | | | | | | | |  | |  | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 26 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 23 | 23 | 23 | 23 | 23 | 24 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | SW 14 | ENE 7 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | S 16 | SSW 15 | ENE 8 | ENE 7 |
| kJ | 436 | 358 | 253 | 188 | 86 | 59 | 42 | 102 | 21 | 73 | 105 | 113 | 101 | 99 | 159 | 86 | 131 | 133 | 240 | 259 |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSW 11 | SSW 11 | SSW 15 | SW 14 | SSW 14 | SSW 14 | SSE 11 | SSW 14 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SW 16 | SSW 12 | SSW 12 | SSW 15 | SSW 15 |
| kJ | 51 | 47 | 47 | 88 | 54 | 81 | 80 | 40 | 77 | 99 | 148 | 162 | 154 | 150 | 96 | 66 | 57 | 47 | 176 | 186 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 15 | SSE 13 | SSW 11 | SSE 12 | SSE 11 | S 11 | NNW 7 | SW 21 | S 11 | S 11 | SSE 10 | SSE 10 | SSE 10 | W 12 | SSW 18 | SW 16 | SSE 10 | SSE 10 | SSE 9 |
| kJ | 68 | 57 | 56 | 39 | 48 | 25 | 22 | 5 | 115 | 20 | 21 | 18 | 19 | 20 | 25 | 102 | 64 | 19 | 36 | 32 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 5 | ENE 6 | ENE 6 | ENE 8 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | — | ENE 7 |
| kJ | — | — | — | — | 23 | 62 | 50 | 107 | 42 | 77 | 165 | 226 | 227 | 432 | 314 | 319 | 305 | 276 | — | 177 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 5 | 16 | 47 | 18 | 16 | 47 | 47 | 16 | 55 | 55 | 55 | 47 | 47 | 47 | 47 | 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.
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