
Surf Forecasts:
Sandy Beach surf forecast from 10 Aug 2026:
- Best quality surf: Saturday 15 Aug, 2PM (local time) - 10ft (3.0m), 13s period, ENE swell with cross-shore winds.
- Most powerful swell: Sunday 16 Aug, 2PM (local time) - 15ft (4.5m), 13s period, ENE swell with 6,839 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 2PM (local time) - 10ft (3.0m), 13s period with ENE swell.
Best Forecast Surf Conditions for Sandy Beach this week:
The surf forecast for Sandy Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 15) at 2PM. The primary swell is predicted to be 3.0m and 13s period with a secondary swell of 0.9m and 13s. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Sandy Beach in the next 16 days are 4.5m 13s and forecast to arrive on Sunday (Aug 16) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 10s period and expected on Sunday (Aug 16) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 15th Aug) | 10ft (3.0m) 13s |
| Best Surf | 2PM (Sat 15th Aug) | 10ft (3.0m) 13s |
| Most Powerful | 2PM (Sun 16th Aug) | 15ft (4.5m) 13s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let’s take a look at what we’ve got on the cards for Sandy Beach over this 16-day stretch.
Honestly, it’s a pretty grim run for most of it. We’re looking at a long stretch of poor conditions with only one real standout day that’s worth getting excited about – and that one’s for experts only.
The water temp is sitting at about 80°, which is pretty much average for this time of year, nothing unusual there.
The pattern starts off with a string of weak, short-period, cross-shore junk. From Sunday the 9th right through to Saturday the 15th, it’s all poor surf with fresh breezes from the ENE to NE, creating lumpy, cross-chop conditions. Swell heights bounce between 3 ft and 6 ft, but the periods are short (mostly 6-8 seconds), and the energy is moderate (566 to 871), but it’s just messy. The wave comments say “poor surf conditions” every time – no recommendation there. So that’s a solid week of nothing worth paddling out for.
Then we hit Sunday the 16th of August – that’s the one day that stands out. The morning and afternoon both show a big groundswell from the ENE, 15 ft with a period of 12-13 seconds. The energy is huge (6695 to 6838). Wind is from the N to NNW at 16 mph, which gives us a cross-offshore situation, and the wave comment says “clean.” The score is high, and it says wind and tide are favorable. But, and this is a big but – that swell is predicted to be too big for this break. Sandy Beach is a beach and reef setup, and with 15 ft and a long period, it’s going to be a heavy, dangerous wave. Only experienced surfers should even consider it, and even then, be careful. This is not for beginners. The long period (12-13 sec) means long sets and a lot of water moving around.
After that, the rest of the outlook from Monday the 17th through Monday the 24th goes back to poor conditions. Swells drop back down to 4 ft to 7 ft, with short periods again (6-8 seconds) and moderate energy (142 to 914). Winds are cross to cross-onshore from the ENE and NE, with fresh to strong breezes creating lumpy, choppy waves. No recommendations here at all. By the end of the run, there’s nothing worth writing home about.
So to sum it up: The first week is a washout. The standout is Sunday the 16th – huge, clean, heavy swell – but it’s for experts only, and the size is a real concern. After that, it’s back to the same old story. Not a great run for Sandy Beach, but it happens.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sun afternoon). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 25°C on Wed afternoon). Mainly fresh winds. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 8 | 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 | S 14 | ENE 8 | ENE 10 | ENE 12 | ENE 13 | ENE 13 |
Wave Graph | ||||||||||||||||||||
276 | 259 | 196 | 215 | 186 | 181 | 269 | 276 | 509 | 498 | 890 | 501 | 653 | 537 | 411 | 424 | 999 | 2053 | 3501 | 4937 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off |
High Tide | 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 | 4:22PM0.64m | 5:04AM0.45m | 4:53PM0.55m | ||||||||
Low Tide | 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 | 10:01AM0.07m | 11:17PM0.04m | 10:54AM0.13m | 11:44PM0.05m | |||||||
— | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | |
7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 25 | 24 | 26 | 24 | 25 | 25 | 24 | 23 | 24 | 22 | 22 | 24 | 23 | 22 | 21 | 23 | 24 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | 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 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 |
86 | 223 | 196 | 176 | 186 | 165 | 269 | 243 | 509 | 498 | 890 | 501 | 653 | 537 | 411 | 411 | 302 | 280 | 219 | 222 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 12 | SSW 15 | SSW 11 | SSW 11 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | W 12 | SSW 12 | W 12 | W 11 | W 12 | E 14 | W 11 | W 11 | S 16 | S 18 |
102 | 56 | 184 | 42 | 23 | 41 | 16 | 276 | 218 | 218 | 25 | 150 | 11 | 10 | 11 | 36 | 21 | 21 | 79 | 99 | |
Swell 3 Height (m) Direction Period (s) | SSW 18 | W 11 | SSW 12 | SE 10 | SSE 9 | SSE 9 | S 21 | SSE 9 | W 13 | W 12 | SE 9 | W 12 | SW 19 | SW 18 | SW 18 | W 12 | SSW 17 | SW 17 | W 13 | W 13 |
102 | 20 | 56 | 23 | 16 | 16 | 79 | 7 | 30 | 25 | 3 | 11 | 14 | 13 | 12 | 11 | 29 | 12 | 30 | 30 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 10 | ENE 12 | ENE 13 | ENE 13 |
276 | 259 | — | 215 | 186 | 181 | 193 | 143 | 176 | 165 | 165 | 188 | 261 | 371 | 387 | 424 | 999 | 2053 | 3501 | 4937 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 47 | 47 | 47 | 47 | 16 | 47 | 47 | 16 | 48 | 110 | 47 | 48 | 110 | 47 | 50 | 59 | 47 | 47 | 70 | 5 |
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.











