Surf Forecasts:
Sandy Beach surf forecast from 24 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 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 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. 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 14s period and expected on Sunday (Aug 23) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Right then, let's have a look at what's on the table for Sandy Beach over the next couple of weeks. I gotta be straight with you – it's a tough stretch ahead. Sandy Beach is a beach and reef setup that's fairly consistent, and it faces ESE, which is its optimum direction for clean swell. But the wind is the enemy here, and it's not letting up for a good while.
The water temp is sitting at 81° right now, which is only 0.5° warmer than average for this time of year, so nothing wild there. Just your typical warm water.
Now, the first real chance of a surfable wave doesn't show up until Saturday the 5th of September. That's a solid two-week gap from the start of the forecast, with nothing but poor conditions before that. The wind is blowing hard out of the ENE and NE, 19 to 25 mph, and it's all cross-shore or cross-onshore, just wrecking any chance of a clean face. You'll be looking at lumpy, messy cross-chop all the way through until the end of August and into early September. The combined swell energy for most of those days is moderate, between 400 and 700, but it's all wind-chop with a period of only 7 seconds. Not worth paddling out for.
The first real standout window is on Saturday the 5th of September. The swell is coming from the ENE at 7 ft, but it's got some proper grunt with a 12-second period, making it a groundswell. The combined energy is a big 1439 (Sunday morning) and 1326 (afternoon), which is strong. Now, a long period swell like this at a beach and reef break can be tricky – it can break a bit too straight and fat. The wind is still a fresh cross-shore at 19 mph, but the forecast notes it's only "marginal" because of tide issues. It's not clean, but it's the best we've seen in weeks.
Then, Sunday the 6th of September is the real beast. The forecast is for a 10 ft swell from the ENE with an 11-second period, and the combined energy is a massive 2397. That is powerful. But here's the catch – the model itself says it's predicted to be too big for this break. The wind is still cross-shore at 19 mph. This is expert territory only, and even then, it's going to be a messy, washing-machine kind of day. The 8 ft swell on the Sunday morning is also right on the edge for most surfers.
Honestly, for the next 16 days, there's only two days that even warrant a look: the 5th and 6th of September, and both are compromised. The 5th is your best bet if you're desperate and can handle lumpy, long-period lines at a spot that might not hold them well. The 6th is just too big and messy for a good session.
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 SummaryMostly dry. Warm (max 26°C on Fri morning, min 25°C on Wed afternoon). Mainly strong winds. | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | ||||||||||||||||||||
349 | 307 | 247 | 240 | 218 | 423 | 310 | 317 | 239 | 307 | 351 | 716 | 427 | 482 | 260 | 324 | 299 | 227 | 227 | 247 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | |||||||
Low Tide | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | |||||||
— | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 24 | 25 | 25 | 26 | 23 | 23 | 22 | 21 | 21 | 22 | 23 | 22 | 22 | 23 | 22 | 21 | 21 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | S 13 | E 13 | S 12 |
191 | 100 | 166 | 156 | 127 | 85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 324 | 225 | 85 | 90 | 102 | |
Swell 2 Height (m) Direction Period (s) | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | NNE 8 | SSW 12 | NNE 8 | SSW 11 | E 13 | E 12 | E 14 | S 13 | E 13 |
35 | 56 | 49 | 47 | 16 | 146 | 81 | 81 | 165 | 135 | 137 | 7 | 47 | 11 | 22 | 32 | 26 | 104 | 89 | 121 | |
Swell 3 Height (m) Direction Period (s) | S 11 | SSW 15 | SSW 18 | SSE 8 | SSE 12 | SSE 12 | SSE 6 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | WNW 10 | NNE 8 | W 10 | NNE 7 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 |
22 | 71 | 62 | 23 | 46 | 29 | 8 | 109 | 14 | 4 | 50 | 9 | 13 | 9 | 9 | 36 | 56 | 89 | 75 | 186 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | E 6 | E 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
349 | 307 | 247 | 240 | 218 | 423 | 310 | 317 | 239 | 176 | 194 | 160 | 144 | 161 | 107 | 140 | 299 | 227 | 227 | 247 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 111 | 48 | 55 | 47 | 47 | 55 | 55 | 48 | 55 | 55 | 47 | 48 | 47 | 47 | 48 | 110 | 48 | 49 | 55 | 49 |
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.











