Surf Forecasts:
Sandy Beach surf forecast from 20 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 8AM (local time) - 2.5ft (0.8m), 17s period, S swell with 358 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 0.8m 17s and forecast to arrive on Thursday (Aug 27) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Friday (Aug 21) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Thu 27th Aug) | 2.5ft (0.8m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on the cards for Sandy Beach.
To be straight with you, the next couple of weeks are a tough watch. We’ve got a long, long stretch of nothing really worth paddling out for, and it starts from now. The first real chance of a wave that’s even worth talking about isn’t until the tail end of the month, so expect a solid gap of quiet, messy conditions right through this week and into the start of next.
The water temp is sitting at 80°, which is right on the money for this time of year – no surprises there.
Let’s jump into the standout window. The best on offer across the whole run lands on Wednesday the 2nd of September. That afternoon, we finally see a bit of a shift. The swell is coming from the NNE at 6ft, with a period of 9 seconds. The wind turns cross-offshore, which is a massive plus – it’ll clean things right up, making for a much smoother surface than the endless chop we’ve been dealing with. The combined energy is moderate at 696, nothing massive, but that offshore wind makes a world of difference. Sandy Beach is exposed to that swell direction, so it should start to show some shape. It’s a fairly consistent setup, and you can expect crowds to be likely once the word gets out. The period is in that mid-range, so it should offer decent waves with a bit of push.
Before that, the only other session that might get you thinking is the morning of Tuesday the 2nd of September. Swell is a bit bigger at 7ft from the NE, period 10 seconds, but the wind is still cross and the water is lumpy. The energy is stronger (1011), but the conditions aren’t clean enough to get excited about. It’s a marginal call at best.
For the rest of the run, it’s mostly strong cross-shore winds, messy cross-chop, and poor surf. There’s a brief pulse of long-period SSW groundswell around the 24th of August, but at 2ft and cross-shore winds, it’s not going to do much here. The energy is moderate (395), but the size just isn’t there, and the wind won’t help.
The bigger swells roll in right at the end of the month and into September, but they’re all accompanied by strong onshore or cross winds. It’s going to be a battle, and honestly, for the paddle surfer, this setup looks more interesting for the kite crew than for us.
So, mark your calendar for Wednesday afternoon, the 2nd of September – that’s your window. The forecast is promising but still a week out, so don’t lock it in just yet, but it’s the one to keep an eye on. Until then, keep the board in the bag.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Thu morning). Winds increasing (light winds from the ENE on Thu night, strong winds from the ENE by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly strong winds. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 18 | SSW 17 | ENE 7 | ENE 7 | ENE 7 | SSW 16 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 6 | ENE 7 | SSW 14 | SSW 13 | E 7 | ENE 8 | ENE 7 | ENE 7 | S 18 | S 18 | S 18 |
Wave Graph | |||||||||||||||||||||
207 | 200 | 111 | 51 | 81 | 322 | 135 | 219 | 311 | 327 | 261 | 240 | 195 | 156 | 233 | 316 | 284 | 204 | 165 | 304 | 161 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross |
High Tide | 10:20AM0.55m | 8:45PM0.20m | 11:21AM0.57m | 10:59PM0.20m | 12:10PM0.60m | 00:02AM0.21m | 12:51PM0.62m | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | |||||||
Low Tide | 7:38PM0.20m | 3:06AM0.11m | 7:49PM0.17m | 4:20AM0.10m | 8:09PM0.14m | 5:23AM0.08m | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | ||||||||
6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 26 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 28 | 28 | 28 | 29 | 30 | 29 | 27 | 24 | 23 | 22 | 22 | 22 | 24 | 24 | 23 | 24 | 24 | 24 | 23 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | E 8 | ENE 7 | ENE 7 | SW 17 | ENE 7 | SSW 16 | ENE 7 | SW 16 | SSW 16 | SW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | SSW 13 |
54 | 131 | 111 | 291 | 81 | 322 | 135 | 255 | 212 | 115 | 191 | 100 | 166 | 156 | 93 | 86 | 142 | 121 | 163 | 304 | 137 | |
Swell 2 Height (m) Direction Period (s) | NE 6 | SSW 17 | SW 16 | ENE 7 | SW 16 | W 10 | SW 16 | W 12 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 12 | E 8 | SSW 17 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | S 18 |
42 | 200 | 274 | 51 | 264 | 31 | 261 | 69 | 104 | 90 | 35 | 56 | 58 | 51 | 94 | 146 | 56 | 56 | 165 | 98 | 161 | |
Swell 3 Height (m) Direction Period (s) | SSW 18 | W 11 | W 9 | NNE 7 | W 10 | S 13 | WNW 10 | S 12 | WNW 10 | SSW 15 | WNW 10 | ESE 9 | SSW 18 | SSE 12 | SSE 12 | SSE 12 | SSE 11 | SSW 18 | SSE 6 | SSE 8 | SSW 16 |
207 | 37 | 27 | 30 | 49 | 54 | 34 | 47 | 62 | 76 | 21 | 29 | 62 | 56 | 45 | 28 | 23 | 109 | 4 | 7 | 86 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 7 | — | ENE 7 | E 7 | ENE 7 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | E 7 | ENE 8 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 |
— | — | — | — | — | 83 | — | 219 | 311 | 327 | 261 | 240 | 195 | 132 | 233 | 316 | 284 | 204 | 139 | 117 | 144 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 5 | 5 | 5 | 14 | 5 | 47 | 57 | 55 | 61 | 63 | 47 | 55 | 55 | 47 | 55 | 55 | 47 | 47 | 16 | 16 |
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.











