Surf Forecasts:
Sandy Beach surf forecast from 30 Jul 2026:
- Most powerful swell: Saturday 1 Aug, 5AM (local time) - 10ft (3.0m), 8s period, ENE swell with 1,055 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 3.0m 8s and forecast to arrive on Saturday (Aug 01) 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 15s period and expected on Friday (Jul 31) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sat 1st Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Imperial Units
Alright, folks, Rusty here with the lowdown on Sandy Beach.
I’m not gonna sugarcoat it – this is a rough stretch of forecasts. Over the next 16 days, there’s not a single session that screams “go.” The whole story is a stubborn east-northeast wind blowing straight across the break, churning the surface into a lumpy, cross-chop mess. The first week, from Thursday the 30th of July through about Wednesday the 5th of August, is a total loss. The swell is there, but it’s short-period junk, and the wind is strong enough to ruin any chance of a clean wave. The wave energy is moderate to strong (429 to 1354), but it’s busy, messy energy.
The water out here is 80°F, which is dead average for this time of year, so that’s one small comfort.
The second week doesn’t offer much relief. There’s a half-hearted chance on Tuesday, the 4th of August, when the swell period stretches to 12 seconds, delivering a 5ft wave from the ENE. The wind eases a bit, but it’s still cross-shore. The longer period is a double-edged sword at a beach and reef spot like this – it can make the waves run too straight. It’s a marginal day at best, not a stand-out.
The most interesting pulse comes on Sunday, the 9th, and Monday the 10th of August. We get a shot of long-period groundswell from the south-southwest, with periods of 16 to 19 seconds. The combined energy on Monday morning is strong at 1124. But here’s the problem: the wind is still hammering from the ENE, and the swell is coming from the wrong direction. This spot loves an east-southeast swell, and we’re getting the opposite. The waves will be there, but they’ll be a messy, cross-shore mess. It’s expert-only, and even then, it’s not a good time.
To be honest, a kiteboarder would have a field day with this relentless cross-wind and lumpy water. For a surfer, this is a 16-day dud. It’s a blank run, and it’s pretty normal for this area when the trade winds get stuck. Best to save your energy for the next forecast.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Fri night). Winds increasing (light winds from the ENE on Thu afternoon, strong winds from the ENE by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun morning, min 24°C on Sun night). Winds decreasing (strong winds from the ENE on Sun morning, light winds from the ENE by Tue night). | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 | SSW 18 | E 7 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 12 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 250 | 207 | 251 | 329 | 385 | 1033 | 902 | 939 | 1009 | 720 | 682 | 554 | 394 | 321 | 237 | 583 | 452 | 345 | 248 | 184 | 147 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 3:57PM0.68m | 4:08AM0.30m | 4:25PM0.65m | 4:55AM0.33m | 4:53PM0.60m | 5:48AM0.38m | 5:22PM0.53m | 6:48AM0.43m | 5:53PM0.45m | 7:57AM0.48m | 6:26PM0.37m | 9:10AM0.55m | 7:10PM0.29m | ||||||||
Low Tide | 8:58AM0.02m | 11:13PM0.07m | 9:38AM0.05m | 11:37PM0.06m | 10:23AM0.11m | 00:02AM0.05m | 11:17AM0.16m | 00:29AM0.04m | 12:27PM0.23m | 00:59AM0.04m | 2:07PM0.27m | 1:37AM0.03m | 4:33PM0.27m | 2:24AM0.02m | |||||||
 | |  | |  | | | |  | | | | | | | | |  | | |  | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 |
Feels °C | 28 | 28 | 26 | 23 | 21 | 21 | 20 | 21 | 21 | 21 | 21 | 22 | 23 | 23 | 23 | 25 | 25 | 25 | 27 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | S 13 | S 12 | E 16 | SW 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 12 | E 12 | ENE 9 | ENE 12 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 8 |
| kJ | 250 | 181 | 166 | 153 | 301 | 223 | 267 | 253 | 194 | 186 | 142 | 125 | 78 | 112 | 237 | 583 | 452 | 345 | 248 | 184 | 147 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 13 | SSW 16 | E 15 | SW 15 | S 12 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 13 | SSW 13 | E 12 | SSW 12 | SSE 14 | SSW 11 | SSW 11 | SSW 15 | SSW 15 |
| kJ | 179 | 171 | 177 | 159 | 239 | 72 | 127 | 123 | 131 | 133 | 67 | 56 | 42 | 32 | 193 | 46 | 65 | 47 | 47 | 88 | 86 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SSW 18 | E 16 | SW 16 | S 12 | N 8 | S 12 | S 11 | S 11 | N 9 | S 11 | SW 13 | SSW 13 | SW 12 | SSW 12 | SSE 12 | SSW 11 | SSE 13 | SSE 13 | SSE 12 | S 12 |
| kJ | 154 | 207 | 127 | 206 | 106 | 5 | 42 | 39 | 22 | 15 | 20 | 42 | 33 | 38 | 49 | 29 | 43 | 58 | 57 | 49 | 46 |
Wind waves Height (m) Direction Period (s) | — | — | E 7 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | — | — | — |
| kJ | — | — | 251 | 329 | 385 | 1033 | 902 | 939 | 1009 | 720 | 682 | 554 | 394 | 321 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 42 | 16 | 55 | 59 | 110 | 113 | 113 | 57 | 59 | 61 | 55 | 50 | 55 | 16 | 16 | 16 | 5 | 14 | 16 | 5 |
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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