
Surf Forecasts:
Sandy Beach surf forecast from 6 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.3m), 16s period, S swell with 890 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 1.3m 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) | 4.5ft (1.3m) 16s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s cooking for the next couple of weeks.
Honestly, it’s a tough stretch ahead. Looking at the whole 16-day window, there’s really only one session that’s worth getting excited about, and it’s a long way off. The rest of the time, the wind is just relentless, and the surf is getting chewed up.
For the first couple of weeks, from Thursday, August 6th right through to Thursday, August 20th, it’s a real write-off. The wind is hammering from the ENE almost constantly, a cross or cross-on shore that’s just destroying any chance of a clean wave. The swell is there, but it’s all wind-affected and messy. The combined energy is often moderate to strong (values like 205, 332, 568, 705, 984), but it’s all for nothing with that wind. There’s a period of strong ENE windswell from the 8th to the 10th, with heights around 5 ft to 7 ft, and again from the 15th to the 19th, with heights pushing 7 ft to 8 ft – but it’s all blown out. For a beach and reef setup like Sandy Beach, that’s really more of a kite-surfing scenario than a paddle session. Don’t bother paddling out.
Now, the one glimmer of hope. It’s a long way off, but on Friday, August 21st, the light finally goes green. The morning session shows a light breeze from the north at 6 mph, blowing cross-offshore. That’s the cleanest wind we’ll see all forecast. The swell is a 4 ft from the NE with a period of 9 seconds, and the combined energy is a solid 458 – moderate, but clean. The forecast is calling for “expect good surf conditions”. This is the standout. It’s the only time the wind is right, and the size is a fun, manageable 4 ft for Sandy Beach. Keep your fingers crossed, because after weeks of trash, this could be a beauty.
Remember, near-term calls are more reliable, so this late-August call is promising but less certain. Get your board ready for that Friday morning.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 24°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 25°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 9 | SSW 14 | 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 7 | ENE 7 | SSW 14 | SSW 14 | S 20 |
Wave Graph | |||||||||||||||||||
86 | 81 | 80 | 107 | 77 | 73 | 148 | 201 | 187 | 265 | 294 | 415 | 294 | 231 | 199 | 215 | 165 | 269 | 485 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross-on |
High Tide | 10:22AM0.61m | 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 | |||||||
Low Tide | 2:24AM0.02m | 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 | |||||||
— | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
7:07 | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 25 | 26 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 22 | 23 | 23 | 23 | 24 | 25 | 24 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | ENE 8 | 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 16 | SSW 15 | ENE 7 | ENE 7 | SSW 14 |
86 | 59 | 42 | 102 | 77 | 73 | 107 | 113 | 101 | 99 | 159 | 86 | 198 | 184 | 191 | 184 | 136 | 132 | 243 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | SSE 11 | ENE 7 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 12 | SSW 11 | SSE 9 | SSW 14 | SSW 14 | S 20 |
82 | 81 | 80 | 40 | 21 | 99 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 56 | 49 | 32 | 165 | 269 | 485 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 11 | S 11 | NNW 7 | SW 21 | S 11 | NE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SSE 10 | SSE 10 | SSE 7 | SSW 11 | SSW 11 | SSE 9 | SSE 9 |
48 | 25 | 22 | 5 | 115 | 20 | 30 | 18 | 19 | 19 | 19 | 102 | 19 | 37 | 11 | 23 | 41 | 30 | 15 | |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 6 | 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 7 | ENE 7 | — | — | ENE 7 |
29 | 40 | 59 | 107 | 37 | 53 | 126 | 201 | 187 | 265 | 294 | 415 | 294 | 231 | 199 | 215 | — | — | 139 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 47 | 18 | 16 | 18 | 47 | 48 | 55 | 55 | 47 | 47 | 55 | 48 | 47 | 48 | 16 | 42 | 16 | 16 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











