Surf Forecasts:
Sandy Beach surf forecast from 29 Aug 2026:
- Most powerful swell: Saturday 5 Sep, 2PM (local time) - 10ft (3.0m), 8s period, ENE swell with 1,351 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 (Sep 05) 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 0.5m 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sat 5th Sep) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about the next 16 days for Sandy Beach. It’s a bit of a rough patch, I gotta be straight with you.
Right off the bat, we’ve got a long stretch with no real good options. The whole first week is a write-off, and it doesn't get much better after that. The wind is a persistent problem here – it’s coming from the ENE, which is a cross-shore, and it’s blowing fresh to strong, just making a mess of everything. The water temp is sitting at about 81°F for the first session, which is pretty normal for this time of year. Even though there’s a bit of swell around, that ENE wind is ruining any chance of a clean wave.
The first few days, from August 29th all the way through September 4th, it’s just poor surf conditions. The swell is there, but it’s short period, wind-affected junk. The combined wave energy is moderate to strong, hitting numbers like 440 to 849 (moderate to strong energy), but it doesn’t matter when the wind is shredding it. The waves are lumpy, cross-chop – not what you want to paddle out into.
Then September 5th and 6th get a bit heavy. The swell really picks up, with heights hitting 10ft and even 16ft on the 6th, but the wind gets nasty too. We’re talking near gale-force cross-shore winds. The energy is massive, hitting 5930 (very strong energy) on the 6th, and the period gets long at 11 seconds. But with that wind, the surf is just a washing machine. That kind of size and wind – this is kite-surfing territory, not really a paddle-out situation for most. The 16ft swell is strictly for experts, but the conditions are so bad it’s hard to recommend for anyone.
There’s a tiny glimmer on September 9th. The afternoon shows a “marginal” call, with a 8ft swell from the ENE and a 9-second period, and the wind drops to a fresh breeze. The energy is still strong (1016), but it’s the least bad we’ve seen. Still, it’s cross-shore, so it’s going to be lumpy. Later on, September 12th and 13th also have “marginal” tags, with a gentler breeze on the 13th, but the swell is still messy and cross-onshore. Honestly, it’s a long wait for anything that looks even slightly fun, and even then, it’s not a standout. The best bet is to keep an eye on the forecasts and hope the wind pattern shifts, because right now, it’s a tough run.
Rusty, signing off.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 26°C on Sun afternoon, min 25°C on Sat morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 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 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
172 | 166 | 444 | 383 | 348 | 265 | 387 | 353 | 410 | 382 | 441 | 582 | 422 | 318 | 379 | 383 | 322 | 319 | 311 | 334 | 560 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | 8:36AM0.61m | 7:01PM0.22m | 9:55AM0.64m | 9:27PM0.19m | ||||||||
Low Tide | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | 5:18PM0.21m | 1:39AM0.06m | 6:33PM0.16m | 3:03AM0.07m | |||||||
6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 22 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 22 | 25 | 24 | 23 | 21 | 22 | 21 | 21 | 22 | 21 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 13 | E 13 | E 13 | E 12 |
126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 192 | 329 | 314 | 364 | 422 | 318 | 279 | 268 | 195 | 176 | 215 | 206 | 105 | |
Swell 2 Height (m) Direction Period (s) | S 13 | S 13 | E 12 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 12 | S 10 | SSE 10 | S 11 | E 13 | E 13 | E 12 | E 12 | S 13 | S 13 | S 13 |
85 | 89 | 106 | 46 | 162 | 59 | 82 | 55 | 51 | 80 | 75 | 35 | 34 | 58 | 125 | 165 | 107 | 71 | 170 | 121 | 119 | |
Swell 3 Height (m) Direction Period (s) | S 13 | S 12 | SSW 17 | SSE 12 | W 11 | ENE 10 | S 21 | SSW 19 | SW 14 | SSE 10 | SW 14 | SW 14 | SW 14 | E 14 | S 11 | SSE 10 | S 10 | E 14 | W 11 | SSW 13 | SSW 20 |
89 | 75 | 186 | 48 | 9 | 37 | 34 | 122 | 54 | 31 | 51 | 51 | 30 | 64 | 61 | 33 | 31 | 65 | 2 | 17 | 37 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
172 | 166 | 444 | 383 | 348 | 265 | 387 | 353 | 410 | 382 | 441 | 582 | 326 | 267 | 379 | 383 | 322 | 319 | 311 | 334 | 560 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 57 | 110 | 55 | 57 | 47 | 55 | 57 | 47 | 48 | 110 | 47 | 47 | 55 | 48 | 47 | 113 | 47 | 110 | 113 | 55 |
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.











