Surf Forecasts:
Sandy Beach surf forecast from 11 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 7ft (2.2m), 10s period, ENE swell with 862 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 10s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 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 | 8PM (Thu 17th Sep) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
G’day, Rusty here. I’ve been over the Sandy Beach forecast for the next 16 days, and it’s a tough one. No real standouts, mostly poor conditions.
First up, from the start through to mid-September, we’ve got cross-shore winds, bumpy chop, and waves from 0.6ft to 1ft, with short periods and weak to moderate energy. It’s all tagged as “poor surf conditions.” Nothing to get wet for.
Then there’s a long stretch from around September 13th right through to September 20th where conditions stay poor—fresh cross-shore winds, lumpy water, and only marginal swell. You’d be wasting your time.
A tiny glimmer shows up on Friday, September 25th. The morning brings a gentle breeze from the ENE at 9 mph, cross-shore, and wave height hits about 7ft from the east with a 10-second period. Combined energy is strong (1020). It’s only marginal, and there’s a risk of thunderstorms later, but that morning is your best chance. The swell direction (E) isn’t ideal for Sandy Beach (optimum is ESE), and afternoon winds shift onshore, so it won’t be perfect—but it’s the only window that’s remotely worth a look.
Water temp is around 81°F, right about average for the season, so at least it’s warm.
Honestly, this kind of dry spell can happen here. Stay patient. If you’ve got to surf, pencil in that Friday 25th morning.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Fri morning, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 25°C on Mon morning). Mainly strong winds. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | NNE 9 | NNE 9 | NE 9 | NE 8 | NE 8 | SSW 13 | E 12 | NE 8 | SSW 19 | ENE 6 | SSW 18 | ENE 8 | ENE 8 | ENE 10 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 387 | 249 | 245 | 160 | 125 | 99 | 99 | 99 | 79 | 74 | 69 | 68 | 50 | 99 | 470 | 165 | 541 | 358 | 629 | 788 | 675 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 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 | 6:56AM0.56m | 5:30PM0.25m | 8:04AM0.54m | 6:18PM0.21m | ||||||||
Low Tide | 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 | 2:59PM0.23m | 11:56PM0.11m | 5:49PM0.21m | 00:44AM0.14m | |||||||
 | |  | | | | | | |  | |  | | | | | | | | |  | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 24 | 24 | 23 | 23 | 24 | 26 | 25 | 24 | 24 | 24 | 25 | 24 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | SW 15 | ENE 10 | NNE 9 | NNE 9 | NNE 9 | NE 9 | NE 8 | NE 8 | NNE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 |
| kJ | 387 | 249 | 245 | 242 | 125 | 99 | 99 | 99 | 79 | 74 | 69 | 44 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | NE 8 | NE 9 | ENE 9 | SW 15 | SSW 15 | SW 12 | SW 14 | SW 22 | SW 21 | NNE 8 | E 12 | E 11 | SW 12 | SW 11 | E 10 | SSW 20 | SSW 19 | SSE 10 |
| kJ | 261 | 229 | 226 | 74 | 81 | 84 | 107 | 84 | 38 | 49 | 227 | 224 | 50 | 67 | 58 | 35 | 31 | 72 | 149 | 210 | 9 |
Swell 3 Height (m) Direction Period (s) | NNE 8 | NNE 8 | SSW 11 | SW 8 | SW 16 | SSW 13 | ENE 9 | ENE 9 | ENE 8 | SW 23 | SW 14 | SSW 13 | E 12 | SW 12 | SW 12 | WSW 8 | WSW 10 | SSW 11 | SSW 11 | SSE 10 | W 10 |
| kJ | 26 | 39 | 24 | 11 | 124 | 68 | 26 | 25 | 14 | 86 | 49 | 68 | 47 | 38 | 38 | 6 | 9 | 12 | 11 | 10 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 10 | — | — | E 5 | ENE 5 | ENE 4 | ENE 5 | ENE 5 | NE 5 | E 6 | NE 8 | ENE 7 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 10 | ENE 9 |
| kJ | — | — | — | 160 | — | — | 25 | 17 | 15 | 39 | 24 | 11 | 33 | 99 | 142 | 165 | 249 | 358 | 629 | 788 | 675 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 16 | 16 | 47 | 16 | 16 | 42 | 16 | 29 | 16 | 47 | 16 | 16 | 47 | 47 | 55 | 110 | 47 | 55 | 59 | 48 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sandy Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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