
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 Thursday (Aug 06) at 11PM.
| 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, Rusty here again. Let’s call it like I see it – Sandy Beach is looking at a rough two weeks. That cross-shore wind is going to be a constant headache, messing up anything that could be good. The water’s sitting around 80°, so pretty normal for the season.
The first bit of surf shows up on Thursday afternoon, August 6th. We’ve got a tiny 1ft swell from the south-southwest, with a 14-second period. That’s a long-period groundswell, which usually means good shape, but the energy is only moderate (198). The wind is a fresh cross-shore from the east-northeast at 19 mph, making it lumpy and choppy. It’s poor.
Friday the 7th is the same story: 1ft SSW swell, moderate energy, cross-shore wind. No good.
Saturday the 8th sees the swell jump to 5ft - 5ft, but it’s short-period wind swell from the east-northeast at only 6-7 seconds. The energy picks up (314 to 352), but the wind is a fresh 22 mph cross-shore. Total chop.
From Sunday the 9th through Tuesday the 11th, the swell stays in the 5ft to 6ft range, all short-period ENE wind swell. The energy gets strong (up to 624), but it’s all wind-driven junk. The wind stays cross-shore, fresh to strong. Nothing clean.
Wednesday the 12th brings a change. We get a 3ft swell from the south, but with a very long period of 18 seconds. The energy is strong (864). That’s a proper groundswell. But the wind is still a fresh cross-shore, so it’ll be frustrating to watch.
Thursday the 13th has a similar deal: 4ft - 4ft from the south, long period (15-16 seconds), strong energy (924 and 819). But the wind is cranking at 22-25 mph, cross-shore. The surface will be ugly.
From Friday the 14th all the way to Wednesday the 19th, the swell builds to 6ft - 8ft, all from the east-northeast, with short periods (7-8 seconds). The energy is strong (up to 879). But the wind is relentless – 19 to 28 mph, always cross-shore. For a beach and reef setup, this is kite-surfing weather, not a surfer’s paradise. It’s all poor.
This pattern keeps going through the 21st. The only tease is on Thursday afternoon, August 20th, when a 2ft swell from the south-southwest with a 21-second period shows up. The energy is solid (449). But again, the wind is fresh cross-shore.
I can’t find a single standout moment in this whole 16-day outlook. Every single day is marked as “poor surf conditions” because of that nasty cross-shore wind. The swell is there, but the wind kills it. Don’t bother with a paddle board – bring a kite.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 25°C on Thu afternoon). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun afternoon). Mainly fresh winds. | |||||||||||||||||||
Thu 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 | ENE 8 | SSW 14 | SSW 14 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 |
Wave Graph | ||||||||||||||||||||
80 | 107 | 77 | 73 | 148 | 183 | 232 | 278 | 261 | 334 | 340 | 292 | 244 | 215 | 188 | 269 | 276 | 509 | 498 | 762 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 8:39PM0.22m | 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 | |||||||
Low Tide | 6:43PM0.21m | 3:25AM0.02m | 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 | |||||||
— | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 26 |
Feels °C | 25 | 24 | 24 | 23 | 24 | 24 | 23 | 22 | 23 | 22 | 24 | 25 | 25 | 26 | 25 | 25 | 23 | 22 | 22 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | SW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 |
43 | 102 | 77 | 73 | 105 | 113 | 101 | 99 | 159 | 86 | 198 | 184 | 234 | 186 | 165 | 269 | 243 | 509 | 498 | 762 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSE 11 | SW 21 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 12 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | S 20 | SSW 13 | SSW 13 | W 12 |
80 | 40 | 115 | 99 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 56 | 34 | 32 | 31 | 27 | 276 | 218 | 218 | 11 | |
Swell 3 Height (m) Direction Period (s) | S 11 | NNW 7 | SSE 11 | S 11 | S 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SSE 10 | SSE 10 | SSW 11 | SSW 11 | SSW 11 | S 21 | SSE 8 | SSE 8 | W 12 | SSE 9 |
22 | 5 | 23 | 20 | 21 | 18 | 19 | 19 | 19 | 102 | 19 | 19 | 42 | 23 | 40 | 79 | 14 | 14 | 25 | 8 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 |
53 | 107 | 49 | 59 | 146 | 183 | 232 | 278 | 261 | 334 | 340 | 292 | 244 | 215 | 188 | 163 | 147 | 123 | 125 | 182 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 20 | 16 | 16 | 48 | 47 | 49 | 55 | 48 | 47 | 49 | 47 | 47 | 47 | 16 | 47 | 18 | 20 | 47 | 55 | 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.











