
Surf Forecasts:
Sandy Beach surf forecast from 10 Sep 2026:
- Most powerful swell: Wednesday 16 Sep, 2PM (local time) - 3ft (0.9m), 18s period, SSW swell with 541 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 0.9m 18s and forecast to arrive on Wednesday (Sep 16) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 18s period and expected on Wednesday (Sep 16) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Wed 16th Sep) | 3ft (0.9m) 18s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about Sandy Beach. I’ll be straight with you – this is a tough outlook. We’ve got a long stretch ahead where the conditions just aren’t cooperating.
We’re looking at a pretty big gap in the action. The first few days... well, there’s nothing to get excited about. From the start of the forecast right through to the 23rd of September, the surf is either poor or marginal. That’s a solid two-week window with no real green lights.
The problems are clear: almost constant cross-shore and cross-onshore winds from the ENE or NE, mostly blowing in the 12 to 22 mph range. That’s creating lumpy, choppy, messy conditions. Even when there’s some energy in the water, the wind just chops it up. On Wednesday the 16th, we see a long-period swell (18 seconds) roll in from the SSW, and the combined energy is strong (820), but with a fresh 19 mph cross-wind, it’s a write-off for a clean surf.
There is one tiny window that peeks through. On the morning of Tuesday the 24th of September, conditions look set to turn. We get a glassy morning – that’s a rare treat. The swell is small, only 2ft from the SSW, but with that long period of 16 seconds, it’ll have some push and shape, especially for a beach and reef setup like Sandy Beach. The combined energy is moderate (444), so there’s some life in the water. The wind is a whisper, from the SE at just 3 mph – practically flat calm. This is your best chance to get a clean wave.
Water temp is about 81°F, which is pretty normal for this time of year, so no surprises there.
For the rest of the period after that, it’s back to onshore slop. Swell sticks around, but the wind swings back onshore, making things lumpy again. Honestly, if you’re not a paddle surfer, the stronger wind days with that short-period, choppy swell might be more interesting for a kite.
Don’t hold your breath for the first two weeks. That Tuesday 24th morning is the one standout; everything else is a waiting game.
- Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Warm (max 27°C on Wed afternoon, min 24°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sat afternoon). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 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) | SSW 13 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | E 11 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | SSW 19 |
Wave Graph | ||||||||||||||||||||
257 | 176 | 203 | 188 | 158 | 387 | 238 | 267 | 128 | 98 | 96 | 75 | 164 | 79 | 72 | 171 | 119 | 79 | 65 | 470 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on |
High Tide | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | 4:10PM0.44m | 5:15AM0.59m | 4:37PM0.37m | 6:02AM0.58m | 5:04PM0.30m | |||||||
Low Tide | 9:01PM0.04m | 8:25AM0.05m | 9:26PM0.04m | 9:14AM0.08m | 9:49PM0.03m | 10:05AM0.12m | 10:11PM0.04m | 10:58AM0.16m | 10:34PM0.05m | 11:57AM0.20m | 10:58PM0.06m | 1:10PM0.23m | 11:24PM0.09m | |||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Temp °C | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 27 | 27 |
Feels °C | 29 | 29 | 26 | 24 | 24 | 23 | 24 | 25 | 25 | 24 | 24 | 25 | 25 | 24 | 24 | 26 | 27 | 27 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 7 | ENE 7 | SW 16 | SW 16 | E 11 | ENE 10 | ENE 10 | NE 9 | NNE 9 | NE 9 | SSW 15 | NE 9 | NE 8 | SW 22 | NE 8 | NE 8 | NE 7 | E 8 |
120 | 161 | 203 | 188 | 268 | 261 | 238 | 267 | 128 | 79 | 96 | 75 | 84 | 79 | 72 | 227 | 119 | 79 | 65 | 114 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | E 13 | E 12 | E 12 | E 11 | NNE 8 | SW 15 | SW 15 | NE 8 | ENE 10 | E 9 | SW 15 | SW 12 | SW 12 | SW 14 | SW 14 | SW 21 | SW 20 | SW 19 | SSW 19 |
257 | 156 | 141 | 101 | 93 | 26 | 229 | 226 | 72 | 98 | 79 | 107 | 37 | 37 | 49 | 49 | 224 | 392 | 384 | 470 | |
Swell 3 Height (m) Direction Period (s) | E 13 | SSW 13 | SSW 13 | SSW 13 | S 12 | SSW 12 | SSW 12 | SSW 11 | SW 15 | SW 16 | SSW 13 | SSW 12 | SSE 9 | ENE 8 | SW 23 | SSE 8 | SW 13 | E 8 | E 8 | NE 7 |
166 | 176 | 133 | 131 | 69 | 47 | 46 | 24 | 242 | 124 | 68 | 57 | 8 | 14 | 86 | 7 | 44 | 29 | 42 | 56 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 7 | ENE 7 | ENE 11 | NNE 8 | — | — | — | — | ENE 9 | NE 9 | ENE 5 | ENE 5 | NE 8 | — | — | — | ENE 8 |
— | — | — | 127 | 158 | 387 | 50 | — | — | — | — | 62 | 164 | 41 | 42 | 171 | — | — | — | 220 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 14 | 47 | 47 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 34 | 16 | 5 | 14 | 23 | 16 | 5 |
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.










