
Surf Forecasts:
Sandy Beach surf forecast from 6 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 11AM (local time) - 3.5ft (1.0m), 18s period, S swell with 627 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 1.0m 18s and forecast to arrive on Wednesday (Aug 12) at 11AM. Winds are predicted to be cross-shore 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 | 11AM (Wed 12th Aug) | 3.5ft (1.0m) 18s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let’s break it down.
First off, I gotta be straight with ya – this stretch of the next 16 days is a real bummer for us surfers. Every single session in the forecast is marked as poor surf conditions, and the wind is a constant cross-shore, never giving us that clean, glassy window we’re after. There’s no standout day, no hidden gem in the second week. It’s just a long, flat, or messy run.
The first recommendation would be… well, there isn’t one. The whole period from August 5th right through to August 20th shows nothing but poor surf. That’s a solid 16-day gap with no good options. The water temperature at Sandy Beach is sitting at 80°, which is about normal for this time of year – no big anomaly to get excited about.
Now, the swell does try to show up. Late in the first week and into the second, we see some solid energy. On August 9th, the combined swell energy hits 611 and then 675 (moderate wave energy), with a short-period 6 ft swell from the ENE. But with that fresh cross-shore breeze at 22 mph, the surface is gonna be a lumpy, cross-chop mess. Not worth paddling out for.
The swell gets bigger toward mid-August – we’re talking 8 ft on the 14th, 15th, and 16th from the ENE at 8 seconds, with combined energy over 1000 (strong wave energy). But again, the wind is a strong breeze at 25–28 mph, cross-shore, creating messy, choppy conditions. That’s big enough for experts only, but the wind just ruins it. Honestly, with that setup, this looks more interesting for kitesurfing than paddle surfing.
The long-period swells from the SSW and S show up on a few days – like August 6th with a 1 ft, 14-second groundswell, and later around the 12th with 3 ft at 18 seconds. But the energy is weak to moderate (135–210 on the 6th, 975 on the 12th), and the cross-shore wind still trashes the surface. Those long-period swells need a point break or a river mouth to really shine, but here at this beach-and-reef setup, they’ll just break too straight and the wind will kill any shape.
So, there’s nothing to recommend. Plain and simple. The area is having a real quiet spell, and forecasts can change, but right now, leave your board at home.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 24°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 26°C on Sat afternoon, min 25°C on Sat afternoon). Mainly fresh winds. | |||||||||||||||||||
Wed 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 9 | ENE 9 | SSW 14 | SSW 14 | ENE 5 | SSW 14 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | SSW 16 | ENE 7 | SSW 14 | SSW 14 | S 20 |
Wave Graph | ||||||||||||||||||||
203 | 86 | 81 | 80 | 39 | 77 | 73 | 148 | 163 | 240 | 281 | 337 | 385 | 337 | 186 | 191 | 184 | 218 | 269 | 373 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 7:10PM0.29m | 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 | 4:33PM0.27m | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 |
Feels °C | 24 | 25 | 26 | 23 | 24 | 24 | 23 | 24 | 23 | 24 | 23 | 23 | 23 | 24 | 25 | 24 | 24 | 25 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | ENE 9 | ENE 8 | ENE 8 | SW 14 | ENE 5 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | S 16 | ENE 7 | SSW 16 | ENE 7 | SSW 14 | SSW 14 | ENE 7 |
88 | 86 | 59 | 42 | 102 | 37 | 73 | 105 | 113 | 101 | 99 | 159 | 86 | 131 | 186 | 191 | 167 | 218 | 269 | 108 | |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSW 14 | SSW 14 | SSW 14 | ENE 8 | ENE 7 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 15 | SSE 9 | SSW 15 | SSE 9 | SSE 9 | SSW 13 |
39 | 82 | 81 | 80 | 22 | 21 | 99 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 184 | 33 | 184 | 31 | 31 | 239 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSE 11 | SSE 11 | S 11 | SSW 14 | SSE 11 | S 11 | NE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SW 16 | SSW 12 | SSW 11 | SSE 9 | W 10 | S 21 | S 20 |
49 | 48 | 25 | 24 | 21 | 77 | 22 | 21 | 17 | 19 | 19 | 19 | 102 | 64 | 56 | 49 | 32 | 18 | 79 | 373 | |
Wind waves Height (m) Direction Period (s) | ENE 9 | ENE 5 | ENE 6 | ENE 6 | ENE 5 | — | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | — | ENE 7 | — | ENE 7 | ENE 7 | — |
203 | 38 | 45 | 47 | 39 | — | 71 | 146 | 163 | 240 | 281 | 337 | 385 | 337 | — | 181 | — | 163 | 132 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 16 | 47 | 20 | 17 | 47 | 47 | 47 | 55 | 55 | 48 | 47 | 55 | 47 | 48 | 47 | 18 | 16 | 16 | 20 |
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.











