Surf Forecasts:
Sandy Beach surf forecast from 10 Sep 2026:
- Most powerful swell: Wednesday 16 Sep, 5PM (local time) - 3ft (0.9m), 18s period, SSW swell with 541 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 0.9m 18s and forecast to arrive on Wednesday (Sep 16) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 18s period and expected on Wednesday (Sep 16) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Wed 16th Sep) | 3ft (0.9m) 18s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Well, folks, I gotta be straight with you – Sandy Beach is looking like a bit of a write-off for the next fortnight. We’ve got a solid 16-day window ahead, but there’s not a single session I’d paddle out for. The whole stretch from now through to the end of the month is a no-go.
Let’s break it down. Starting with Thursday the 10th, we’ve got a 5ft ENE swell rolling in at a short, weak 7-second period. The combined energy is a moderate 477, but that ENE wind is howling cross-on at 12 mph, turning it into a choppy mess. It’s just poor conditions, and it doesn’t let up. The water temperature is about average for this time of year, so nothing wild there.
Through Friday the 11th and Saturday the 12th, the swell drops to 4ft and then 3ft, with periods around 10-11 seconds. The wind stays cross-shore or cross-on, and the energy dips to 413 and then 203. Still poor. Sunday the 13th through to Tuesday the 15th is a real flat spell – swell bottoming out at 1ft with a long 15-second period but hardly any energy (222 down to 94). The wind is relentless, always cross or cross-on, keeping it lumpy and unrideable.
We get a little spike on Wednesday the 16th afternoon with a 3ft SSW swell and a very long 18-second period, pushing the combined energy up to 670 – that’s strong. But the wind is still cross-on at 12 mph, and the forecast says “poor surf conditions.” That long-period groundswell might be better suited for a point or reef, but Sandy Beach is a beach-and-reef setup, and with that onshore wind, it’s just messy.
The rest of the run through to Friday the 25th is the same story. Swell heights hover around 3ft to 5ft, periods are all over the place, but the wind never cleans up. It’s mostly cross-shore or cross-on from the ENE, with speeds up to 25 mph. The energy ranges from moderate to strong (972 on the 18th, 1034 on the 18th afternoon), but it doesn’t matter – it’s all blown out. There’s no standout session, no window of glassy offshore goodness.
Honestly, with this persistent cross-shore wind and the beach setup, this looks more interesting for kite surfing than paddle surfing. The conditions are just too rough for a decent wave. We’ll have to wait for a change in the pattern.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed night. Warm (max 27°C on Wed night, min 24°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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 13 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | E 11 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | SSW 19 |
Wave Graph  | |||||||||||||||||||
 kJ | 176 | 203 | 188 | 162 | 387 | 286 | 227 | 128 | 125 | 99 | 99 | 84 | 79 | 82 | 54 | 119 | 79 | 67 | 470 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | 4:10PM0.44m | 5:15AM0.59m | 4:37PM0.37m | 6:02AM0.58m | 5:04PM0.30m | |||||||
Low Tide | 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 | 11:57AM0.20m | 10:58PM0.06m | 1:10PM0.23m | 11:24PM0.09m | ||||||
 |  | |  |  | |  | | | | | | | | | | | |  | |
 | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:38 | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — |
mm | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 |
Feels °C | 29 | 26 | 25 | 23 | 23 | 24 | 24 | 24 | 24 | 25 | 24 | 23 | 23 | 25 | 26 | 27 | 28 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | SW 16 | ENE 11 | E 11 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | SSW 19 |
| kJ | 138 | 203 | 188 | 268 | 387 | 286 | 227 | 128 | 125 | 99 | 99 | 79 | 79 | 82 | 54 | 119 | 79 | 67 | 470 |
Swell 2 Height (m) Direction Period (s) | E 13 | E 12 | SSW 12 | E 11 | SW 16 | SW 15 | SW 15 | NE 9 | NE 9 | ENE 9 | E 9 | SSW 15 | SW 12 | SW 14 | SW 22 | SW 21 | SW 20 | SW 19 | E 7 |
| kJ | 156 | 141 | 121 | 93 | 261 | 229 | 226 | 75 | 81 | 84 | 57 | 84 | 38 | 49 | 227 | 224 | 392 | 384 | 39 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | E 12 | S 12 | NNE 8 | NNE 8 | NNE 8 | SW 15 | SW 16 | SSW 13 | SW 15 | SW 12 | ENE 8 | SW 23 | SW 14 | SW 13 | ESE 7 | E 7 | E 11 |
| kJ | 176 | 133 | 101 | 69 | 26 | 51 | 40 | 242 | 124 | 68 | 107 | 37 | 14 | 86 | 49 | 44 | 16 | 27 | 37 |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 7 | — | — | NNE 8 | — | — | — | — | ENE 9 | ENE 6 | ENE 5 | ENE 5 | — | — | — | NE 7 |
| kJ | — | — | — | 162 | — | — | 76 | — | — | — | — | 59 | 47 | 42 | 33 | — | — | — | 64 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 48 | 48 | 16 | 18 | 16 | 16 | 16 | 16 | 16 | 16 | 19 | 29 | 16 | 5 | 14 | 14 | 14 | 16 |
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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