Surf Forecasts:
Sandy Beach surf forecast from 29 Aug 2026:
- Most powerful swell: Friday 4 Sep, 5PM (local time) - 5ft (1.5m), 13s period, ENE swell with 660 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 1.5m 13s and forecast to arrive on Friday (Sep 04) at 5PM. 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 | 5PM (Fri 4th Sep) | 5ft (1.5m) 13s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s coming up for Sandy Beach.
Right off the bat, I gotta be straight with you – there’s a long stretch of poor surf conditions from Saturday, August 29th, all the way through to Sunday, September 6th. The wind is just not playing ball; it’s a persistent fresh cross-shore from the ENE, sometimes more cross-on, and it’s got the surface all lumpy and messy. Swell is there, between 5 ft and 7 ft, but it’s short-period windswell, mostly around 6 to 8 seconds, and coming from the ENE, which is far from ideal for this spot. The combined energy sits in the moderate range (533 to 897), but with the wind chop, it’s just not worth paddling out for. The water temperature is about average for this time of year.
Then we hit Monday, September 7th, and things start to change. The swell bumps up to 8 ft from the ENE, and the energy jumps way up into the strong range (1679 to 1715). This is big, powerful stuff, but it’s still cross-shore wind and lumpy, so it’s only really for the experts out there. The quality is still marginal, with a score of just 1 out of 10, meaning it’s messy and only for those who really know what they’re doing. This continues through Tuesday, September 8th, and into Wednesday morning, September 9th.
Now, the standout moment comes on Wednesday, September 9th in the afternoon. The wind finally eases up to a gentle breeze from the NNE, going cross-offshore, and the conditions turn clean. The swell drops to 5 ft from the ENE, still a bit short period at 8 seconds, but with that clean face, it’s the best we’ll see. The combined energy is moderate (616). This is your window – it’s not a world-beater, but it’s rideable and clean. The rest of the forecast into the second week, from Thursday, September 10th onwards, fades back into poor conditions with light breezes and cross-onshore winds, and a few weird long-period pulses from the south dropping the energy.
So, if you’re itching for a paddle, circle Wednesday afternoon, September 9th. That’s your best bet. The rest is a write-off or for the hardcore crew only.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 26°C on Sat morning, min 25°C on Fri night). Mainly strong winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 26°C on Wed morning, min 25°C on Mon night). Mainly fresh winds. | ||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 229 | 233 | 189 | 458 | 336 | 293 | 303 | 316 | 384 | 451 | 441 | 508 | 533 | 422 | 345 | 302 | 288 | 226 | 225 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross | cross | cross-on | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 3:47AM0.44m | 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 | |||||||
Low Tide | 10:10PM0.06m | 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 | ||||||
 |  |  | | | |  | | |  | | | | | | | | | | |
 | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:50 | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 25 | 26 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 23 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 22 | 24 | 24 | 23 | 22 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | S 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | ENE 8 |
| kJ | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 192 | 311 | 314 | 364 | 422 | 318 | 275 | 206 | 195 | 206 |
Swell 2 Height (m) Direction Period (s) | E 14 | S 13 | S 13 | SSW 17 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 12 | S 10 | SSE 10 | S 11 | S 11 | E 13 | E 12 | S 13 |
| kJ | 146 | 85 | 89 | 186 | 46 | 162 | 59 | 82 | 55 | 51 | 80 | 75 | 35 | 19 | 38 | 61 | 84 | 148 | 225 |
Swell 3 Height (m) Direction Period (s) | SW 19 | S 13 | S 12 | W 12 | SSE 12 | ENE 11 | ENE 10 | S 21 | SSW 19 | SW 14 | SSE 10 | SW 14 | SW 14 | SW 14 | E 12 | E 13 | SSE 10 | SSE 10 | E 12 |
| kJ | 56 | 89 | 75 | 11 | 48 | 40 | 37 | 34 | 122 | 54 | 31 | 51 | 51 | 30 | 48 | 80 | 33 | 33 | 141 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 7 | 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 8 | ENE 8 | — |
| kJ | 194 | 233 | 189 | 458 | 336 | 293 | 303 | 316 | 384 | 451 | 441 | 508 | 533 | 363 | 345 | 302 | 288 | 226 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 47 | 55 | 57 | 63 | 55 | 55 | 47 | 49 | 57 | 47 | 47 | 110 | 47 | 47 | 61 | 47 | 47 | 47 | 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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