Surf Forecasts:
Sandy Beach surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 18ft (5.5m), 15s period, SSW swell with 11,991 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 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 Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.2m and 10s. Another secondary swell of 0.9m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sandy Beach in the next 16 days are 5.5m 15s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 12s period and expected on Tuesday (Sep 08) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Best Surf | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Most Powerful | 11PM (Mon 7th Sep) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Sandy Beach. Gotta be straight with ya – it’s a tough outlook. The whole 16-day stretch is pretty flat and messy, with a long gap of junk surf before we see anything remotely worthwhile.
The action starts off weak Monday the 7th with a stormy, onshore mess. Not worth paddling out. Tuesday the 8th has a bit more size – 8ft from the SSW – but that fresh cross-onshore wind will chop it to bits. We see a brief chance Wednesday the 9th morning with a 3ft SSW groundswell, period a nice 14 seconds, and a light cross breeze, but the energy is pretty weak (602 combined energy). It’s marginal, maybe a longboard session if you’re desperate. Then we hit a real dry spell. From Thursday the 10th right through to Sunday the 20th, it’s a whole lot of nothing – small, weak, and mostly cross-shore. Scores are all zero. That’s nearly two weeks of ugly.
Now, if you’ve got patience, the only real stand-out in the whole window is Tuesday the 22nd of September. Mark it. Early morning, we’ve got glassy conditions – dead calm with a 2ft breeze. The swell is a tiny 2ft, coming from the SSW with a 14-second period, which is a nice little groundswell. Energy is still low (244), but for Sandy Beach, with perfect conditions, that’s your best bet. It’ll be clean, maybe a few fun little runners for a log or a mid-length. Because it’s such a long-range call, don’t bet the farm on it, but it’s the only light in the tunnel. Crowds are likely at this spot, so get there early.
Overall, a frustrating 16 days ahead. A big blank run like this is pretty normal for the area when the trade winds lock in. Forecasts can change though.
Stay patient,
Rusty
Short Range ForecastModerate rain (total 17mm), heaviest on Mon afternoon. Warm (max 27°C on Mon afternoon, min 26°C on Tue night). Winds decreasing (near gales from the SSE on Mon night, calm by Tue night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 25°C on Thu afternoon). Mainly fresh winds. | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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 12 | SSW 14 | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NE 9 | NE 8 | ENE 9 | NE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 672 | 8841 | 1000 | 650 | 356 | 269 | 257 | 203 | 231 | 192 | 140 | 380 | 245 | 250 | 160 | 128 | 75 | 57 | 84 | 58 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross |
High Tide | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | 4:10PM0.44m | ||||||||
Low Tide | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 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 | |||||||
 |  | |  |  | |  |  | | | | | |  | | | | | | | |
 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
mm | 5 | 9 | 1 | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 27 | 24 | 26 | 27 | 30 | 30 | 29 | 30 | 26 | 25 | 24 | 24 | 25 | 24 | 25 | 25 | 25 | 25 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 14 | ENE 12 | ENE 11 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | SSW 13 | SW 16 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 6 | NE 8 | NE 8 | NE 8 |
| kJ | 1999 | 1190 | 785 | 443 | 353 | 165 | 117 | 203 | 141 | 129 | 268 | 380 | 245 | 250 | 160 | 128 | 31 | 57 | 57 | 58 |
Swell 2 Height (m) Direction Period (s) | E 12 | SSW 15 | W 10 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | NNE 9 | NE 9 | ENE 9 | SSW 15 | SW 12 |
| kJ | 672 | 696 | 552 | 650 | 137 | 269 | 257 | 156 | 129 | 101 | 93 | 261 | 229 | 226 | 242 | 49 | 75 | 46 | 84 | 38 |
Swell 3 Height (m) Direction Period (s) | S 9 | SSW 15 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | SSW 13 | SSW 16 | SW 18 | SSW 12 | SSW 11 | NNE 8 | SW 8 | NNE 8 | SW 16 | ENE 9 | SW 15 | SW 12 | SW 15 |
| kJ | 181 | 581 | 474 | 235 | 356 | 168 | 166 | 176 | 181 | 154 | 75 | 43 | 32 | 18 | 45 | 124 | 48 | 107 | 37 | 54 |
Wind waves Height (m) Direction Period (s) | ENE 8 | SSW 14 | SSW 10 | — | — | — | — | SE 4 | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | — | — | E 5 | ENE 9 | ENE 8 |
| kJ | 395 | 8841 | 1000 | — | — | — | — | 3 | 231 | 192 | 140 | — | — | — | — | — | — | 20 | 82 | 54 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 108 | 112 | 126 | 7 | 3 | 5 | 14 | 16 | 16 | 16 | 16 | 42 | 16 | 18 | 23 | 16 | 17 | 16 | 16 | 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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