
Surf Forecasts:
Sandy Beach surf forecast from 7 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4ft (1.2m), 16s period, S swell with 762 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 1.2m 16s and forecast to arrive on Thursday (Aug 13) at 2AM. 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 Friday (Aug 07) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 13th Aug) | 4ft (1.2m) 16s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, I’m lookin’ at the 16-day window for Sandy Beach, and honestly, it’s a tough stretch. The whole period is plagued by persistent cross-shore and cross-onshore winds, mostly from the ENE and NE, crankin’ at 12 mph to 25 mph. That’s gonna keep the surface lumpy and choppy, no matter what swell shows up. The water temp is sittin’ around 80°, which is pretty much average for this time of year, so no surprises there.
The first recommendation doesn’t show up until Monday, August 17th, so there’s a solid 10-day gap of poor conditions before we even get a sniff of anything rideable. Even then, it’s barely worth a mention.
Monday, August 17th – The morning’s still a write-off with poor surf, but by the afternoon, we’re lookin’ at a *marginal* setup. Swell’s comin’ from the ENE at 7 ft, with a period of 10 seconds, and the combined energy is strong at 1088. That’s a decent amount of water moving, but the wind’s still a cross-shore fresh breeze, so it’s gonna be lumpy. The swell’s over 5 ft, so it’s not for beginners, and the direction (ENE) is cross to the beach’s optimum ESE. It’s a beach and reef setup, so with that much wind and chop, it’s honestly lookin’ more interesting for kite surfers than paddle surfers. Crowds are often here, so expect company if you’re desperate.
Tuesday, August 18th – Similar story. Swell holds around 6 ft to 6 ft from the ENE, period 9 to 10 seconds, still cross-shore winds. Combined energy drops to 669–799, still moderate to strong. Another day of marginal quality at best. The wind is a bit lighter (16 mph), but still cross, so don’t expect any glassy moments.
After that, it tails off into poor conditions again through the rest of the week. There’s a tiny flicker on Friday, August 21st when a long-period S/SSW swell at 14–18 seconds shows up, but only 1 ft to 3 ft, so it’s tiny and weak. The wind is lighter that morning (gentle breeze), but still cross-shore, so it’s not gonna deliver.
The real standout? There isn’t one. If I had to pick the *least worst* window, it’s the afternoon of Monday, August 17th, and maybe Tuesday, August 18th. But even then, it’s lumpy, blown out, and marginal. This is a tough run for Sandy Beach—forecasts can change, but right now, I’d say leave the board at home and go do something else.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 25°C on Fri morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
AM | 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) | SSW 14 | SSW 14 | SSW 19 | ENE 6 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 |
Wave Graph | |||||||||||||||||||||
77 | 73 | 148 | 225 | 226 | 227 | 222 | 294 | 294 | 300 | 246 | 252 | 214 | 269 | 276 | 509 | 498 | 762 | 734 | 559 | 524 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross |
High Tide | 11:25AM0.67m | 10:36PM0.19m | 12:21PM0.73m | 00:00AM0.20m | 1:10PM0.77m | 1:01AM0.23m | 1:55PM0.79m | 1:52AM0.27m | 2:36PM0.79m | 2:40AM0.31m | 3:14PM0.76m | 3:27AM0.36m | 3:49PM0.71m | 4:15AM0.41m | |||||||
Low Tide | 7:38PM0.16m | 4:32AM0.00m | 8:16PM0.11m | 5:38AM-0.02m | 8:50PM0.08m | 6:37AM-0.03m | 9:21PM0.06m | 7:31AM-0.04m | 9:52PM0.05m | 8:22AM-0.02m | 10:21PM0.04m | 9:11AM0.01m | 10:50PM0.04m | ||||||||
6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 |
Feels °C | 24 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 24 | 25 | 24 | 25 | 25 | 24 | 23 | 22 | 22 | 22 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | NE 7 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | SSW 16 | ENE 8 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 |
21 | 25 | 107 | 113 | 101 | 99 | 184 | 86 | 223 | 300 | 176 | 181 | 165 | 269 | 243 | 509 | 498 | 762 | 734 | 559 | 524 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | ENE 7 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 15 | SSW 11 | SSE 9 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | W 12 | W 12 | W 12 | W 11 |
77 | 73 | 19 | 162 | 154 | 150 | 96 | 102 | 56 | 184 | 42 | 16 | 41 | 30 | 276 | 218 | 215 | 11 | 11 | 11 | 10 | |
Swell 3 Height (m) Direction Period (s) | SSE 11 | SW 20 | SSW 19 | SSE 10 | SSE 10 | SSE 10 | NE 9 | SSW 18 | SSE 10 | SSW 12 | SSE 10 | SSW 11 | SSE 9 | S 21 | SSE 8 | W 13 | W 12 | S 20 | SE 9 | SE 10 | SW 18 |
23 | 99 | 148 | 19 | 19 | 19 | 13 | 102 | 19 | 56 | 18 | 23 | 32 | 79 | 7 | 30 | 25 | 8 | 3 | 4 | 13 | |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 5 | ENE 6 | ENE 6 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | E 7 | ENE 7 | ENE 7 | ENE 7 |
30 | 25 | 89 | 225 | 226 | 227 | 222 | 294 | 294 | — | 246 | 252 | 214 | 188 | 226 | 218 | 167 | 345 | 277 | 317 | 335 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 47 | 17 | 47 | 48 | 47 | 47 | 47 | 47 | 47 | 48 | 47 | 47 | 55 | 47 | 47 | 55 | 47 | 59 | 59 | 48 |
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.











