Surf Forecasts:
Sandy Beach surf forecast from 31 Aug 2026:
- Most powerful swell: Saturday 5 Sep, 5PM (local time) - 8ft (2.5m), 13s period, ENE swell with 2,440 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 2.5m 13s and forecast to arrive on Saturday (Sep 05) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 8s period and expected on Sunday (Sep 06) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sat 5th Sep) | 8ft (2.5m) 13s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into it.
Looking at the next 16 days for Sandy Beach, and I gotta be straight with you – this is a tough stretch. There's a lot of swell on the cards, but the wind is just not playing ball for most of it. The water temp is sitting at 81°, which is about average for this time of year, so you won't need a thick wetsuit.
The first week is a write-off. We've got a solid run of ENE swell coming through from Sunday the 30th of August right through to the 7th of September, but it's being hammered by a fresh to strong cross-shore wind. The wave energy is in the moderate to strong range, hitting 610 (moderate) on Sunday and climbing up to 4649 (very strong) on the 5th, but it's all messy cross-chop. Not worth paddling out for. There's a brief moment on the 2nd of September morning where the swell drops to 3 feet from the S with a long 16-second period, but it's still crossed out by an ENE wind at 22 mph. It's a tease.
The conditions finally start to look up on Monday the 8th of September. The wind shifts to a cross-offshore from the NNE, and the surf is clean. The problem is the swell is just too big for Sandy Beach. We're looking at 15 feet from the E on Tuesday morning with a very long period of 12 seconds, and the energy is massive at 6450 (very strong). This is expert-only territory, and even then, that long period groundswell is going to be breaking straight and closing out on a beach break like this. It's more of a sight to see than a wave to ride. This continues into Wednesday the 9th with 10 feet swell and glassy conditions – the wind is nearly nothing at 3 mph, which is a major positive for cleanliness, but again, the size is too much for the spot.
After that, the swell drops back down, but the wind turns onshore again on the 10th and 11th, bringing back the chop. There is a glimmer on Friday the 11th of September morning. The wind goes glassy with a light SSE breeze, and the swell is a manageable 7 feet from the ENE with an 8-second period. The wave energy is still moderate at 751. This is the only window in the entire 16 days where the conditions line up for a decent, clean surf. It won't be perfect, but it'll be the best you're going to get. After that, it's back to cross-shore wind and lumpy conditions through to the 14th.
So, if you're waiting for a standout, it's the morning of Friday the 11th of September. It's the only time the wind gives us a break and the swell is the right size. Get on it if you can, because the rest of the window is a bust.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sun night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sat morning. Warm (max 26°C on Wed afternoon, min 25°C on Wed night). Winds decreasing (near gales from the ENE on Thu night, fresh winds from the ENE by Sat morning). | |||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 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) | 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 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 13 | ENE 13 |
Wave Graph | ||||||||||||||||||||
348 | 320 | 394 | 417 | 410 | 475 | 533 | 520 | 422 | 382 | 749 | 1128 | 846 | 1449 | 1612 | 956 | 746 | 827 | 2440 | 1780 | |
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 | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 11:03AM0.68m | 11:10PM0.21m | |||||||
Low Tide | 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 | 7:10PM0.12m | 4:28AM0.06m | |||||||
— | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | |
6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 5 | 2 |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 23 | 22 | 21 | 22 | 22 | 22 | 24 | 22 | 24 | 23 | 24 | 20 | 20 | 20 | 22 | 22 | 22 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | 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 | SE 12 | SSE 11 | SSE 11 | E 13 | ENE 8 | ENE 13 | ENE 13 |
100 | 199 | 144 | 138 | 192 | 329 | 314 | 364 | 422 | 318 | 275 | 206 | 144 | 137 | 170 | 198 | 413 | 827 | 2059 | 1780 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 12 | S 10 | SSE 10 | S 11 | S 11 | SE 16 | SE 14 | S 14 | S 14 | E 14 | S 10 | S 9 | SSW 8 | SW 8 |
162 | 59 | 57 | 55 | 50 | 80 | 77 | 35 | 19 | 40 | 37 | 61 | 100 | 134 | 94 | 232 | 244 | 159 | 99 | 73 | |
Swell 3 Height (m) Direction Period (s) | W 11 | S 20 | S 21 | SSW 19 | SW 14 | S 10 | SW 14 | SW 14 | E 14 | E 14 | SSW 13 | S 10 | E 12 | SW 18 | SW 12 | S 13 | S 13 | S 13 | SSE 8 | S 12 |
9 | 30 | 34 | 122 | 54 | 30 | 52 | 51 | 33 | 66 | 17 | 18 | 73 | 12 | 6 | 87 | 119 | 50 | 51 | 139 | |
Wind waves Height (m) Direction Period (s) | 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 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | ENE 13 | — |
348 | 320 | 394 | 417 | 410 | 475 | 533 | 520 | 410 | 382 | 749 | 1128 | 846 | 1449 | 1612 | 956 | 746 | — | 2440 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 57 | 49 | 55 | 55 | 47 | 47 | 110 | 47 | 47 | 55 | 63 | 114 | 217 | 113 | 113 | 110 | 110 | 48 | 59 | 47 |
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.











