Surf Forecasts:
Sandy Beach surf forecast from 16 Sep 2026:
- Most powerful swell: Tuesday 22 Sep, 2AM (local time) - 8ft (2.5m), 9s period, ENE swell with 913 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 2.5m 9s and forecast to arrive on Tuesday (Sep 22) at 2AM. 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 | 2AM (Tue 22nd Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what Sandy Beach has in store for us.
Right now, the outlook is pretty grim. We’re looking at a long stretch of poor conditions kicking off from Tuesday the 15th all the way through to the morning of Wednesday the 23rd. That’s over a week of no-go surf. The wind is consistently cross or cross-onshore, gusting strong from the NE and ENE, up to 25 mph, just ruining any chance of a clean wave. The swell is all over the place – short period, messy, and the wave energy is mostly weak to moderate with values between 131 and 1191, but the combo of wind and chop makes it useless for a paddle. Honestly, with those strong winds and lumpy conditions, it looks more interesting for kite surfing than for a proper surf session.
Now, hold onto your board, because things finally change around Wednesday the 23rd. The standout window is Wednesday the 23rd afternoon through to Thursday the 24th. The wind swings around to a light WSW and W, going cross-offshore, and the water gets clean. We’ve got a solid 8ft to 8ft swell rolling in from the east with a period of 9 to 10 seconds. That’s a decent groundswell, and the combined energy is pumping hard, hitting values of 1303 and 1316 – that’s strong wave energy, no doubt. This is for experienced surfers only, as it’s over 8ft. The wave quality is rated as excellent. If you’ve got the skills, Thursday the 24th morning and afternoon are your best bet, with light winds and clean faces at Sandy Beach. The water temp is a warm 81°F, which is bang on average for this time of year, so no wetsuit needed.
After that, conditions fade a bit. Friday the 25th and Saturday the 26th are still surfable, but the wind turns cross-on or glassy, and the swell drops a little. By Saturday the 26th, we get some glassy conditions with a 8ft ENE swell – still decent, but nothing compared to that Thursday peak. Crowds at Sandy Beach are often, so expect company, especially on those cleaner days.
So, the pick of the bunch is clear: Wednesday the 23rd afternoon through Thursday the 24th. That’s when Sandy Beach will be pumping, clean, and firing for those who can handle it. The rest of the forecast is mostly a washout or just average.
Rusty, signing off.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu night. Warm (max 26°C on Tue morning, 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) | NE 8 | NE 8 | SSW 19 | ENE 6 | SSW 18 | ENE 6 | ENE 7 | ENE 9 | SSW 18 | ENE 8 | SSW 17 | E 8 | E 7 | E 8 | E 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 60 | 71 | 470 | 112 | 541 | 262 | 462 | 606 | 644 | 622 | 580 | 680 | 491 | 531 | 537 | 532 | 512 | 561 | 534 | 709 | 913 |
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 | 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 | 6 | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 27 | 26 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 24 | 23 | 24 | 24 | 23 | 22 | 23 | 22 | 22 | 23 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | S 16 | SSW 15 | SSW 14 | S 14 | S 14 | S 13 |
| kJ | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 606 | 644 | 622 | 580 | 539 | 382 | 387 | 273 | 239 | 300 | 280 | 195 | 179 | 168 |
Swell 2 Height (m) Direction Period (s) | NNE 8 | E 12 | NNE 7 | E 10 | E 10 | SW 11 | SSW 20 | SSW 16 | WSW 10 | SSE 9 | SE 6 | S 20 | SSW 18 | S 18 | SW 16 | SSW 15 | SW 15 | SW 15 | SSW 14 | SW 13 | SW 13 |
| kJ | 25 | 68 | 37 | 73 | 100 | 19 | 149 | 322 | 9 | 8 | 11 | 67 | 108 | 99 | 121 | 146 | 104 | 33 | 79 | 46 | 46 |
Swell 3 Height (m) Direction Period (s) | E 12 | SW 12 | E 11 | SW 12 | SW 11 | S 22 | SW 11 | SSW 19 | SW 10 | W 9 | W 9 | W 9 | SSE 8 | SSE 6 | SSW 14 | SSE 8 | SSE 8 | W 12 | W 11 | W 11 | N 12 |
| kJ | 46 | 38 | 58 | 35 | 31 | 9 | 18 | 210 | 4 | 7 | 6 | 2 | 7 | 8 | 38 | 7 | 6 | 11 | 10 | 2 | 12 |
Wind waves Height (m) Direction Period (s) | NE 8 | NE 8 | ENE 6 | ENE 6 | NE 6 | ENE 6 | ENE 7 | — | ENE 8 | ENE 8 | ENE 8 | E 8 | E 7 | E 8 | E 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 9 |
| kJ | 60 | 71 | 53 | 112 | 148 | 262 | 462 | — | 575 | 561 | 427 | 680 | 491 | 531 | 537 | 532 | 512 | 561 | 534 | 709 | 913 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 47 | 47 | 20 | 47 | 55 | 47 | 55 | 57 | 48 | 55 | 57 | 49 | 57 | 57 | 49 | 55 | 57 | 48 |
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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