Surf Forecasts:
Sandy Beach surf forecast from 29 Jul 2026:
- Most powerful swell: Saturday 1 Aug, 2PM (local time) - 10ft (3.0m), 8s period, ENE swell with 1,081 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 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 0.7m 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 | 2PM (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 take a look at what Sandy Beach has in store for the next couple weeks.
Honestly, it’s a tough outlook. Your first real chance to surf comes Wednesday morning, July 29th. We’ve got a clean 6ft swell from the ENE with a 10-second period, and a light 9 mph cross-offshore breeze from the north – that’s going to make for some clean, lined-up waves. The water is a warm 80°, right around normal for the season. The combined wave energy is moderate at 892 – decent power behind it. This Wednesday morning session is the true standout of the whole forecast. The swell direction is a good match for the break’s favorite ESE exposure, and with that offshore wind, the wave quality should be solid. It’s an intermediate spot and fairly consistent, but it does get crowded often, so expect some company.
From Wednesday afternoon, it starts to fall apart. By Thursday morning, the wind goes cross-onshore and the swell drops to 5ft with a short, weak 8-second period – just messy. And then, from Friday the 31st through the whole first week of August, it’s a rough run. Onshore and cross-shore winds blowing 19 to 28 mph, lumpy and choppy. The swell hangs between 5ft and 8ft but with those short periods and dirty wind, it’s not worth it. The energy numbers climb as high as 1394 by Saturday the 1st, but that’s just wind-driven chop. For anyone with a kite, those strong cross-breezes and 8ft lumps could be a blast, but for a surfboard, it’s pretty much a write-off.
The second week doesn’t give us much hope. Tuesday morning, August 4th, has a hint of something: a 5ft swell with a longer 11-second period, but the wind is light cross-onshore and the quality is only marginal. Not enough to get the heart racing. After that, into the second week, the swell stays under 3ft with short periods, and the wind never cleans up. The combined energy drops into the 300-500 range – weak and uninspiring.
So here’s the call: if you can make Wednesday morning, July 29th, get after it. That’s your one real window. After that, it’s a long, dusty stretch of poor conditions for two weeks straight. For an exposed break like Sandy Beach, this kind of dry spell is pretty normal when the trade winds settle in.
Hang in there – forecasts change. I’ll be watching.
- Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Fri night). Winds increasing (light winds from the NE on Wed afternoon, strong winds from the ENE by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 24°C on Sat night). Winds decreasing (strong winds from the ENE on Sat morning, light winds from the ENE by Mon night). | ||||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | |||||||||||||||
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 10 | ENE 9 | S 14 | ENE 8 | ENE 8 | E 7 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 697 | 413 | 184 | 250 | 207 | 320 | 375 | 426 | 946 | 916 | 979 | 1058 | 801 | 699 | 554 | 439 | 361 | 824 | 503 | 452 | 338 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross |
High Tide | 3:28PM0.69m | 3:26AM0.26m | 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 | ||||||||
Low Tide | 8:21AM0.00m | 10:49PM0.08m | 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 | |||||||
 | |  |  | |  | | | | | | | | | | | | |  | |  | |
 | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — |
 | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 28 | 29 | 28 | 27 | 25 | 26 | 24 | 21 | 21 | 20 | 20 | 21 | 21 | 21 | 21 | 24 | 22 | 23 | 26 | 28 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | S 12 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 12 | E 13 | ENE 12 | ENE 11 | ENE 11 | ENE 10 |
| kJ | 697 | 413 | 176 | 250 | 204 | 228 | 153 | 301 | 205 | 267 | 253 | 194 | 186 | 198 | 125 | 77 | 119 | 824 | 503 | 452 | 338 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | E 15 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSE 13 |
| kJ | 195 | 195 | 184 | 179 | 171 | 166 | 159 | 239 | 223 | 127 | 123 | 131 | 133 | 67 | 57 | 42 | 32 | 49 | 47 | 43 | 59 |
Swell 3 Height (m) Direction Period (s) | SW 21 | SSW 20 | NNE 7 | SW 18 | SSW 18 | SSW 16 | SW 16 | S 12 | S 12 | S 12 | S 11 | S 11 | N 9 | N 9 | SW 13 | SSW 13 | SW 12 | SSW 17 | SSW 16 | SSE 14 | SW 15 |
| kJ | 17 | 37 | 54 | 154 | 207 | 177 | 206 | 106 | 69 | 42 | 39 | 22 | 16 | 14 | 42 | 54 | 38 | 30 | 26 | 65 | 57 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 7 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — |
| kJ | — | — | — | — | — | 320 | 375 | 426 | 946 | 916 | 979 | 1058 | 801 | 699 | 554 | 439 | 361 | 202 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 5 | 5 | 5 | 47 | 20 | 55 | 61 | 111 | 132 | 110 | 57 | 55 | 59 | 50 | 50 | 50 | 16 | 5 | 5 | 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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