Surf Forecasts:
Sandy Beach surf forecast from 15 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 11AM (local time) - 7ft (2.1m), 10s period, ENE swell with 782 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 10s and forecast to arrive on Thursday (Sep 17) 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 0.9m 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 | 11AM (Thu 17th Sep) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about Sandy Beach.
To be straight with you, it’s a tough outlook. The surf is poor for a long stretch, with no real standout sessions in the forecast. The first time things even look rideable is Saturday the 26th of September. That morning we’ve got a small 3-foot swell from the SSW with a long period of 15 seconds. The wind is light out of the ESE, so it’ll be a bit cross-onshore but not too messy. The combined swell energy is moderate at 780. It’s a marginal call – a 1 out of 10. Sandy Beach is a beach and reef setup, and that long-period groundswell might make it a bit fat and straight, so don’t expect perfection.
After that, it’s back to poor conditions through the 27th and 28th. The next and only other chance comes on Tuesday the 29th of September – both morning and afternoon – with 5-foot swell from the NNE and a 9-second period. Light wind again, but still cross-onshore. Energy is moderate to strong at 805. Again, it’s just marginal. The water is about 81°, which is average for this time of year.
Honestly, with the constant cross and cross-onshore winds and lumpy seas, this stretch looks more like a kite-surfing setup than a good paddle session. If you’re keen, the 26th or 29th are your best bets, but don’t expect much.
Stay patient, mate. The blank run is real this time.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Thu night. Warm (max 27°C on Tue afternoon, min 26°C on Tue morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 25°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 8 | NE 8 | SSW 19 | ENE 10 | SSW 18 | NE 6 | ENE 10 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 52 | 71 | 470 | 314 | 541 | 203 | 782 | 592 | 644 | 622 | 580 | 539 | 382 | 387 | 400 | 362 | 373 | 447 | 403 | 414 | 449 |
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-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross |
High Tide | 5:04PM0.30m | 6:56AM0.56m | 5:30PM0.25m | 8:04AM0.54m | 6:18PM0.21m | 9:21AM0.54m | 9:37PM0.19m | 10:30AM0.55m | 11:10PM0.22m | 11:25AM0.57m | 11:56PM0.25m | 12:07PM0.59m | 00:31AM0.29m | ||||||||
Low Tide | 1:10PM0.23m | 11:24PM0.09m | 2:59PM0.23m | 11:56PM0.11m | 5:49PM0.21m | 00:44AM0.14m | 6:28PM0.17m | 2:11AM0.15m | 6:51PM0.15m | 3:49AM0.15m | 7:13PM0.13m | 5:00AM0.13m | 7:32PM0.11m | ||||||||
 | |  | | |  | |  |  | | | | | | | | | | |  | | |
 | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — |
mm | — | — | — | — | — | — | — | 2 | 8 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 25 | 24 | 24 | 25 | 23 | 24 | 23 | 23 | 24 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | S 16 | SSW 15 | SSW 14 | SSW 14 | S 14 | S 13 |
| kJ | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 322 | 644 | 622 | 580 | 539 | 382 | 387 | 350 | 239 | 300 | 350 | 265 | 232 | 168 |
Swell 2 Height (m) Direction Period (s) | NNE 8 | E 12 | NNE 8 | SW 12 | E 10 | E 10 | SSW 20 | SSW 19 | WSW 8 | SSE 9 | SSE 7 | SSE 7 | SSW 18 | S 18 | SW 16 | SSW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 |
| kJ | 36 | 68 | 32 | 35 | 100 | 125 | 149 | 210 | 7 | 7 | 18 | 21 | 108 | 99 | 121 | 146 | 104 | 33 | 52 | 46 | 46 |
Swell 3 Height (m) Direction Period (s) | E 12 | SW 12 | E 11 | S 6 | SW 11 | SW 11 | SW 11 | SSW 10 | SSE 10 | W 9 | W 9 | S 20 | SSE 6 | SSE 6 | SSW 14 | SSE 8 | W 13 | W 12 | W 13 | W 11 | W 12 |
| kJ | 46 | 38 | 58 | 3 | 31 | 19 | 18 | 10 | 9 | 6 | 6 | 67 | 12 | 13 | 37 | 6 | 3 | 11 | 13 | 10 | 11 |
Wind waves Height (m) Direction Period (s) | ENE 8 | NE 8 | ENE 5 | ENE 10 | NE 5 | NE 6 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 8 |
| kJ | 52 | 71 | 51 | 314 | 100 | 203 | 782 | 592 | 606 | 472 | 427 | 416 | 350 | 359 | 400 | 362 | 373 | 447 | 403 | 414 | 449 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 18 | 47 | 47 | 47 | 47 | 49 | 47 | 55 | 57 | 55 | 48 | 55 | 48 | 55 | 57 | 47 | 50 | 55 | 50 |
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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