Surf Forecasts:
Sandy Beach surf forecast from 27 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 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 | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let’s talk Sandy Beach. Over the next 16 days, it’s a tough stretch. The first real shot at anything worth paddling out for doesn’t come until Thursday the 3rd of September. Before that, from the 26th of August through the 2nd of September, it’s all cross-shore winds, lumpy chop, and poor surf – nothing to get excited about. Swell energy is moderate (between 510 and 898), but the wind just kills it. Water temp is about 81°, right around average for the time of year.
The first standout is Thursday the 3rd of September morning. Swell from the ENE at 6ft, 8-second period, with moderate cross-shore winds (16 mph). Energy hits 736 – still moderate, but it’s the best so far. It’s only a marginal call, but it’s a chance. Friday the 4th of September morning is another marginal window: 6ft ENE swell, 8-second period, with a gentle cross-onshore breeze (9 mph). Strong energy at 838, but the wind isn’t perfect.
Then there’s a gap until Sunday the 6th of September. That morning, the wind goes light onshore from the ESE (6 mph), and the swell shifts to the SSW at 3ft, but with a very long 17-second period. That’s groundswell – it’ll have shape, but on a beach break, that long period can make the waves wall up. Energy is moderate at 619. Monday the 7th of September morning is similar: 3ft SSW swell, 15-second period, light cross-onshore, energy 683 – marginal but worth a look if you’re keen.
After that, it’s back to poor conditions with cross-shore winds and chop. The 10th of September has a 5ft ENE swell with a 12-second period, but strong breeze (25 mph) makes it messy.
Bottom line: Sandy Beach is in a rough patch. The best bets are the mornings of the 3rd, 4th, 6th, and 7th of September, but none are clean. If you’re a kiter, those cross-shore winds might work, but for paddle surfing, it’s a lean time.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 25°C on Wed afternoon). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sat afternoon). Mainly strong winds. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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) | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 253 | 252 | 265 | 326 | 229 | 217 | 229 | 286 | 458 | 444 | 489 | 444 | 444 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on |
High Tide | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | |||||||
Low Tide | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 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 | |||||||
 |  | | | | | | |  | |  | | | | | | | | |  | |
 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 21 | 22 | 22 | 23 | 23 | 22 | 24 | 23 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 10 | SSW 18 | S 18 | S 17 |
| kJ | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 51 | 329 | 230 | 273 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | N 8 | SSW 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | E 11 | SSW 16 | S 11 | S 11 | S 11 | S 19 | S 10 | S 12 | S 10 |
| kJ | 135 | 137 | 6 | 47 | 10 | 78 | 109 | 146 | 85 | 89 | 106 | 65 | 162 | 59 | 57 | 82 | 192 | 48 | 75 | 31 |
Swell 3 Height (m) Direction Period (s) | W 10 | SSW 16 | NW 9 | W 9 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSW 12 | E 11 | ENE 10 | S 21 | SSW 19 | SW 14 | SSW 14 | SW 14 | SW 14 |
| kJ | 8 | 50 | 3 | 7 | 24 | 22 | 36 | 56 | 89 | 75 | 186 | 46 | 61 | 37 | 34 | 122 | 54 | 80 | 51 | 52 |
Wind waves Height (m) Direction Period (s) | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 |
| kJ | 160 | 206 | 182 | 151 | 131 | 150 | 160 | 253 | 252 | 265 | 326 | 229 | 217 | 229 | 286 | 458 | 444 | 489 | 444 | 444 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 55 | 55 | 48 | 48 | 19 | 47 | 59 | 47 | 55 | 61 | 48 | 55 | 55 | 48 | 48 | 57 | 16 | 47 | 49 | 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.
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