Surf Forecasts:
Sandy Beach surf forecast from 14 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 15ft (4.5m), 10s period, E swell with 3,502 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 4.5m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Friday (Aug 21) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 16th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright team, Rusty here. Gotta be straight with you – this stretch of the forecast is a real heartbreaker for Sandy Beach. We’re looking at a long, long run of poor conditions.
The whole first week is a write-off. From Friday the 14th right through to Wednesday the 20th, the wind is howling out of the ENE and NE, mostly cross-shore or cross-onshore, and it’s cranking at 15 to 35 mph. That’s creating a mess of lumpy, choppy, cross-chop. The swell is there, but it’s junk. On Saturday the 15th we’ve got a meaty 10ft to 12ft of ENE swell, but it’s being shredded by a near-gale wind. Combined wave energy is through the roof (1674 to 2465), but it’s all just blown-out, dangerous whitewater. That’s only for experts, and even then, it’s not fun. Don’t bother.
There’s a brief glimmer of something different around the 20th and 21st, with a long-period SSW groundswell (16 to 18 seconds) showing up, but it’s tiny at 2ft and the wind is still a problem. The energy is low (around 115 to 366), so it’s not doing anything.
We finally get a window of interest on Thursday the 27th of August. Overnight on the 27th and into Friday the 28th, an E swell builds to 5ft with a very long period of 17-18 seconds. That’s a proper groundswell. The combined energy jumps up to 1987, which is solid. The wind drops to a moderate breeze from the ENE and NE, still cross or cross-on, but it’s manageable. The forecast calls it “marginal,” but that’s the best we’ve got. Keep in mind, that long period groundswell (over 15 seconds) can be a bit tricky on a beach break like Sandy – it might break too straight, so you’ll want to pick your peak carefully. The crowds are often here, so expect a few lads chasing the same clean-up sets.
Friday the 28th and Saturday the 29th taper off, with the swell dropping to 4ft and the period still long (14-16 seconds), but the wind turns more onshore, ruining the shape. The energy drops from 1500 down to 852.
So, the summary: Look, there’s almost nothing to get excited about for two whole weeks. The water temp is a standard 81°F, so that’s fine. But the wind is relentless. The only real standout is Thursday the 27th of August, with that long-period E groundswell – it’s a distant hope, but it’s the only shot we’ve got.
Stay salty.
Rusty.
Short Range ForecastHeavy rain (total 36mm), heaviest during Sun morning. Warm (max 26°C on Fri morning, min 25°C on Fri morning). Winds decreasing (near gales from the ENE on Sat night, moderate winds from the E by Sun night). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Mon morning, min 25°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 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) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | S 14 | S 13 | S 13 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 8 | SSW 18 | SSW 17 | E 8 |
Wave Graph | |||||||||||||||||||||
494 | 540 | 1081 | 1452 | 2232 | 3457 | 1781 | 858 | 463 | 310 | 260 | 222 | 165 | 163 | 151 | 140 | 172 | 104 | 207 | 200 | 103 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on |
High Tide | 4:22PM0.64m | 5:04AM0.45m | 4:53PM0.55m | 5:55AM0.48m | 5:21PM0.47m | 6:52AM0.50m | 5:48PM0.38m | 7:56AM0.52m | 6:10PM0.31m | 9:08AM0.53m | 10:20AM0.55m | 8:45PM0.20m | |||||||||
Low Tide | 10:01AM0.07m | 11:17PM0.04m | 10:54AM0.13m | 11:44PM0.05m | 11:53AM0.20m | 00:11AM0.05m | 1:08PM0.25m | 00:39AM0.07m | 2:59PM0.27m | 1:14AM0.09m | 2:00AM0.10m | 7:38PM0.20m | 3:06AM0.11m | ||||||||
6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | |
mm | — | — | — | — | — | 3 | 15 | 6 | 12 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 23 | 23 | 22 | 21 | 21 | 22 | 21 | 26 | 27 | 24 | 23 | 23 | 23 | 23 | 24 | 25 | 24 | 25 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | SSE 8 | ENE 9 | SSE 7 | S 14 | S 14 | S 13 | S 13 | S 13 | ENE 8 | SW 16 | ENE 8 | E 8 | E 8 | SSW 17 | E 8 |
411 | 411 | 306 | 222 | 168 | 179 | 108 | 858 | 58 | 264 | 260 | 222 | 165 | 162 | 151 | 129 | 172 | 104 | 93 | 200 | 103 | |
Swell 2 Height (m) Direction Period (s) | W 12 | E 11 | W 11 | W 11 | W 13 | S 18 | S 13 | SSE 8 | S 14 | S 6 | S 5 | W 11 | SW 17 | SW 18 | S 13 | S 12 | S 12 | SW 16 | NE 7 | SSW 11 | SW 16 |
11 | 62 | 9 | 9 | 30 | 101 | 157 | 210 | 246 | 24 | 8 | 10 | 74 | 79 | 116 | 44 | 45 | 129 | 47 | 23 | 274 | |
Swell 3 Height (m) Direction Period (s) | SW 18 | W 12 | SW 17 | SW 17 | S 19 | W 13 | S 16 | S 13 | S 16 | SW 18 | SSW 19 | SSW 19 | E 9 | W 13 | SW 18 | W 12 | SSW 16 | S 12 | SSW 18 | SSE 9 | S 15 |
12 | 11 | 12 | 12 | 65 | 30 | 132 | 165 | 81 | 50 | 37 | 37 | 15 | 31 | 79 | 25 | 100 | 45 | 207 | 8 | 38 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 10 | ENE 9 | SSE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 8 | ENE 7 | NE 7 | — | ENE 7 | NE 7 |
494 | 540 | 1081 | 1452 | 2232 | 3457 | 1781 | 389 | 463 | 310 | 237 | 203 | 147 | 163 | — | 140 | 158 | 50 | — | 135 | 47 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 111 | 217 | 141 | 111 | 217 | 113 | 111 | 14 | 48 | 47 | 19 | 47 | 47 | 16 | 47 | 16 | 16 | 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.











