Surf Forecasts:
Sandy Beach surf forecast from 15 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 2PM (local time) - 7ft (2.1m), 10s period, ENE swell with 799 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 2PM. 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 | 2PM (Thu 17th Sep) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what's cookin' at Sandy Beach over the next couple of weeks. Gotta be straight with you, the first week and a half is a real write-off. We're looking at a solid gap of nearly two weeks with no real surf on offer, from now until the 25th of September. It's a tough run, but hang in there, because the back half of the outlook has some promise.
The water is sitting at about 81°, which is bang on average for this time of year, so no surprises there.
Things finally start to look up on Thursday the 25th of September. We get a clean-up in the afternoon with some light cross-offshore breezes. Swell is a small 3 ft from the SSW, but importantly, it's a groundswell with a 15-second period, so it'll have some push. The wave energy is moderate.
The standout window is Saturday the 26th and Sunday the 27th. Saturday morning is looking sweet—clean conditions with a light cross-offshore wind, 3 ft of SSW swell at 15 seconds. The combined swell energy is dropping a bit, but the quality is there. Then Saturday afternoon gets even better: 3 ft SSW swell at 14 seconds, still glassy with that light cross-offshore, and the energy picks up a little. This is the best on offer. Sunday follows up with 3 ft SSW swell at 16 seconds and clean conditions again. It doesn't get huge, but with such good wind and long-period groundswell, Sandy's shape will be dialed.
Remember, this spot can get crowded, so get out there early. It's not a beginner wave at the best of times, and at this size and with that long period, it'll be a proper surfer's wave.
That's the story. It's a long wait, but that last weekend looks like it will deliver.
- Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 25°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Thu night. Warm (max 27°C on Fri morning, min 26°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | NE 8 | NE 8 | SSW 13 | ENE 6 | NE 8 | SSW 19 | ENE 10 | SSW 18 | ENE 6 | ENE 10 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | ENE 8 | E 7 | ENE 8 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 58 | 149 | 68 | 53 | 96 | 470 | 331 | 541 | 185 | 763 | 630 | 644 | 622 | 580 | 539 | 392 | 402 | 427 | 411 | 345 | 365 |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on |
High Tide | 4:37PM0.37m | 6:02AM0.58m | 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 | ||||||||
Low Tide | 11:57AM0.20m | 10:58PM0.06m | 1:10PM0.23m | 11:24PM0.09m | 2:59PM0.23m | 11:56PM0.11m | 5:49PM0.21m | 00:44AM0.14m | 6:28PM0.17m | 2:11AM0.15m | 6:51PM0.15m | 3:49AM0.15m | 7:13PM0.13m | 5:00AM0.13m | |||||||
 |  |  | | |  | | | | |  |  | | | | | | |  | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 13 | — | — | 3 | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 25 | 25 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 25 | 23 | 25 | 24 | 23 | 26 |
Swell 1 Height (m) Direction Period (s) | NE 8 | SW 22 | NE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | S 15 | SSW 15 | SSW 14 |
| kJ | 58 | 227 | 31 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 | 622 | 580 | 539 | 382 | 387 | 350 | 233 | 296 | 276 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 21 | NNE 8 | E 12 | E 11 | SW 12 | SW 11 | E 10 | SSW 20 | SSW 19 | SSE 10 | SSE 10 | SSE 7 | SSE 6 | SSW 18 | SSE 6 | SW 16 | SSW 15 | SW 15 | SW 15 |
| kJ | 49 | 49 | 224 | 24 | 68 | 58 | 35 | 43 | 96 | 149 | 210 | 9 | 9 | 18 | 7 | 108 | 16 | 121 | 146 | 104 | 33 |
Swell 3 Height (m) Direction Period (s) | SW 23 | SSW 11 | SSW 13 | E 12 | SW 12 | SW 12 | S 9 | S 8 | SSW 11 | SW 11 | SSE 10 | WSW 10 | W 9 | W 9 | S 20 | SSE 7 | S 18 | SSW 14 | SSE 7 | W 13 | W 12 |
| kJ | 86 | 12 | 68 | 46 | 38 | 38 | 6 | 5 | 12 | 18 | 10 | 9 | 7 | 6 | 67 | 15 | 99 | 37 | 5 | 13 | 12 |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 8 | NE 5 | ENE 6 | NE 8 | ENE 5 | ENE 10 | ENE 10 | ENE 6 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | ENE 8 | ENE 7 |
| kJ | 23 | 149 | 41 | 53 | 96 | 75 | 331 | 427 | 185 | 763 | 630 | 534 | 427 | 438 | 427 | 392 | 402 | 427 | 411 | 345 | 365 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 16 | 18 | 18 | 47 | 110 | 47 | 47 | 48 | 16 | 48 | 42 | 16 | 59 | 55 | 47 | 49 | 55 | 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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