Surf Forecasts:
Sandy Beach surf forecast from 31 Jul 2026:
- Most powerful swell: Saturday 1 Aug, 8AM (local time) - 10ft (3.0m), 8s period, E swell with 1,220 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 8AM. 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 | 8AM (Sat 1st Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let’s switch gears for the imperial crew. This 16-day outlook is a tough pill to swallow. There’s no good surf on the table, and the pattern is locked in ugly. The wind is howling out of the ENE, 15 to 28 mph, and it’s cross or cross-on, just wrecking everything.
Right from Thursday 30th July, it’s a no-go. The first record is a clean miss, and it stays that way for a long stretch. The whole first week is a mess. On Saturday 1st August, we’ve got a 10-foot swell from the E with a short period of 8 seconds – that’s just a big, choppy wall of whitewater. The combined energy is a massive 1578 (strong to very strong wave energy), but it’s unsurfable. This is more of a kiteboarder’s paradise than a surfer’s. Water temp is about 80°, right around average for the time of year.
The only thing that even looks marginal is Tuesday 4th August morning. The swell drops to 5 feet, period bumps up to 12 seconds – that’s a proper groundswell. Wind is still cross-shore at 12 mph, and it’s only rated "marginal." It’s your best bet, but it’s not a beauty. The wave energy is moderate at 706. After that, it’s back to the same old story: poor conditions, cross wind, and no quality.
The second week is even weaker. By Thursday 13th August, the energy tank is down to 123 (weak) with waves around 3 feet. Nothing to paddle for. No standout sessions here, folks. The 4th is the only faint pulse, and even that is a fight with the wind.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Thu night). Winds increasing (moderate winds from the ENE on Thu afternoon, strong winds from the ENE by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Tue afternoon, min 25°C on Sun afternoon). Winds decreasing (strong winds from the ENE on Sun afternoon, light winds from the ENE by Tue night). | |||||||||||||||||||
Thu 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | SSW 18 | ENE 7 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 12 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 207 | 220 | 329 | 469 | 1015 | 1142 | 939 | 1098 | 844 | 782 | 554 | 394 | 339 | 824 | 648 | 505 | 373 | 266 | 92 | 147 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross |
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 | 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 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 28 | 26 | 23 | 21 | 21 | 20 | 20 | 21 | 21 | 20 | 21 | 23 | 22 | 22 | 26 | 25 | 25 | 28 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | S 13 | S 12 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | ENE 12 | ENE 12 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 |
| kJ | 181 | 166 | 153 | 301 | 267 | 267 | 257 | 194 | 188 | 142 | 125 | 119 | 163 | 824 | 648 | 505 | 373 | 266 | 92 | 147 |
Swell 2 Height (m) Direction Period (s) | S 13 | SSW 16 | E 15 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 15 | SW 14 |
| kJ | 171 | 177 | 159 | 239 | 220 | 127 | 123 | 131 | 133 | 67 | 57 | 32 | 32 | 48 | 46 | 45 | 41 | 40 | 88 | 53 |
Swell 3 Height (m) Direction Period (s) | SSW 18 | E 16 | SW 16 | S 12 | SSW 12 | S 12 | S 11 | S 11 | N 9 | N 9 | SW 13 | SW 13 | SW 12 | SSE 9 | SSE 8 | SSE 14 | SW 15 | SW 16 | SSW 11 | S 12 |
| kJ | 207 | 127 | 206 | 106 | 47 | 42 | 39 | 22 | 16 | 13 | 42 | 42 | 38 | 16 | 12 | 63 | 57 | 61 | 39 | 45 |
Wind waves Height (m) Direction Period (s) | — | ENE 7 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | SE 6 | E 5 | ENE 6 |
| kJ | — | 220 | 329 | 469 | 1015 | 1142 | 939 | 1098 | 844 | 782 | 554 | 394 | 339 | 370 | — | — | — | 33 | 58 | 54 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 55 | 16 | 55 | 61 | 111 | 114 | 110 | 113 | 61 | 57 | 50 | 55 | 50 | 16 | 23 | 16 | 16 | 18 | 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.
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