Surf Forecasts:
Sandy Beach surf forecast from 30 Aug 2026:
- Most powerful swell: Saturday 5 Sep, 11AM (local time) - 10ft (3.0m), 8s period, E swell with 1,314 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 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 14s period and expected on Monday (Aug 31) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sat 5th Sep) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let’s put it in terms you can feel. For Sandy Beach, we’re looking at a similar story but in feet and miles per hour. The next 16 days are a real bummer.
Starting Sunday, August 30th, there’s a 7 ft swell from the ENE, but it’s a short period of 7 seconds. The wind is blowing a strong 25 mph cross-onshore, making it a total mess. The combined energy is moderate at 659. This rough pattern sticks around for the first week, with the wind staying between 19 and 25 mph from the ENE, keeping the ocean lumpy and criss-crossed with chop. The swell sits between 6 ft and 8 ft, but the period never gets above 8 seconds, and the energy stays moderate (up to 956).
Come Wednesday, September 9th, we get a big 10 ft swell from the ENE with a 10-second period, and the energy jumps to a strong 1922. The wind finally drops to a light 9 mph cross-shore, which would be clean, but this swell is way too big for Sandy Beach. It’s for experts only, and even then, it’s sketchy. The water temp is about average for the time of year.
The next day, Thursday the 10th, is the best we’ve got. The swell drops to 7 ft from the ENE, period still 8 seconds, and the energy is moderate at 1011. The wind goes onshore, but it’s only 3 mph from the ESE in the afternoon. That’s the closest we get to a clean window, but it’s still marginal. After that, it’s back to poor conditions with fresh cross-shore winds and lumpy seas through to the 14th.
The only real standout is the 10th, but it’s a weak one. If you’re itching to get wet, that’s your best shot, but don’t expect much. This is a tough stretch, and the forecast might change, but as it stands, it’s not looking good.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 25°C on Sat night). Mainly strong winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu morning. Warm (max 26°C on Wed morning, min 25°C on Tue night). Mainly strong winds. | ||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 526 | 394 | 325 | 210 | 376 | 382 | 439 | 451 | 383 | 475 | 422 | 318 | 303 | 322 | 373 | 355 | 498 | 589 | 727 |
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 | cross | cross | cross | cross |
High Tide | 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 | 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 | — | — |
 | 6:49 | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 |
Feels °C | 21 | 23 | 23 | 22 | 22 | 23 | 22 | 24 | 24 | 22 | 24 | 24 | 25 | 21 | 21 | 21 | 20 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | 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 14 | E 13 |
| kJ | 102 | 171 | 100 | 199 | 144 | 138 | 192 | 329 | 314 | 364 | 422 | 318 | 275 | 206 | 192 | 176 | 225 | 229 | 219 |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | S 10 | S 12 | S 10 | SSE 10 | S 11 | E 13 | E 13 | E 12 | E 12 | S 13 | S 13 | S 13 |
| kJ | 186 | 46 | 162 | 59 | 82 | 57 | 51 | 30 | 77 | 35 | 34 | 59 | 123 | 117 | 72 | 69 | 170 | 121 | 119 |
Swell 3 Height (m) Direction Period (s) | E 12 | SSE 12 | ENE 11 | ENE 10 | S 21 | SSW 19 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | E 14 | S 11 | SSE 10 | SSE 10 | E 15 | SW 12 | SSW 13 | SSW 20 |
| kJ | 75 | 48 | 40 | 37 | 34 | 122 | 54 | 51 | 51 | 51 | 30 | 66 | 58 | 34 | 33 | 68 | 6 | 17 | 37 |
Wind waves Height (m) Direction Period (s) | 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 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 |
| kJ | 526 | 394 | 325 | 210 | 376 | 382 | 439 | 451 | 383 | 475 | 307 | 300 | 303 | 322 | 373 | 355 | 498 | 589 | 727 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 63 | 55 | 61 | 47 | 55 | 55 | 47 | 48 | 110 | 47 | 47 | 55 | 47 | 55 | 114 | 50 | 113 | 216 | 140 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sandy Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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