
Surf Forecasts:
Sandy Beach surf forecast from 8 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 8AM (local time) - 8ft (2.5m), 10s period, SSW swell with 1,569 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 2.5m 10s and forecast to arrive on Tuesday (Sep 08) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 12s period and expected on Tuesday (Sep 08) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Tue 8th Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, this is Rusty checkin' in from the coast, and I gotta be straight with you – it’s a tough outlook for Sandy Beach. We're lookin' at a long, lean 16-day window where the ocean just isn't cooperating. The first proper surf recommendation doesn't roll around until Tuesday morning, the 8th of September, and even then, it's a bit of a washout.
To start, Tuesday morning the 8th brings rain showers and a stiff 19 mph cross-on shore wind from the SSW. That's makin' a mess of a 8 ft SSW swell. There's a ton of energy in the water – we're talkin' strong conditions (2301) – but with that onshore blow, it's gonna be lumpy and poor. The water temp sits at 81°, pretty much average for this time of year, nothin' crazy there. Tuesday afternoon the wind backs off a notch but stays cross-shore, the swell drops to 6 ft from the ENE with a better 11-second period, but it's still only marginal. Wednesday the 9th is more of the same: small 3 ft SSW swell, long period groundswell, but cross-shore winds keep it from gettin' clean. Thursday the 10th is hopeless – short period 5 ft ENE slop with 19 mph cross-onshore wind.
From there, it’s pretty much a dead zone. Friday the 11th through until Monday the 14th of September, every session is listed as poor surf. The swell barely gets to 3 ft, winds stay cross or cross-onshore, and the quality just isn’t there. The combined energy drops right off into the low two-digit and three-digit range (243, 339, 131), tellin' you the ocean's just flat and weak.
The second week doesn’t get any better. From Tuesday the 15th right through to Wednesday the 23rd of September, it’s a consistent run of poor surf. Winds are strong, mostly 12 to 22 mph from the ENE or NE, keepin' everything messy with a cross-chop. The swell heights hover around 1 ft to 5 ft, but with short periods and those onshore conditions, there's no quality. One to watch: Wednesday morning the 16th sees a tiny 3 ft swell but with a very long 18-second period from the SSW. That's a classic groundswell, but with only 671 in energy and a cross-onshore breeze, it's likely just gonna be a bumpy line-up with barely any push, and at a beach-and-reef break, the long period can make it break straight and close out.
Bottom line: there are no standouts here, not a single session worth paddlin' out for. This is one of those blank runs that's more normal for the area when the trade winds lock in and the swell windows don't line up. The setup on some of those bigger, windier days might look more interesting for the kite crew than for us with a fin and wax. Keep your board in the car, but honestly, don't rush.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue morning. Warm (max 28°C on Tue afternoon, min 25°C on Thu afternoon). Winds decreasing (fresh winds from the SSW on Tue morning, light winds from the S by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 11 | ENE 10 | E 10 | ENE 10 | NE 9 | NE 8 | SSW 15 | ENE 8 | SSW 14 | NE 8 | E 8 |
Wave Graph | |||||||||||||||||||||
1042 | 650 | 378 | 269 | 257 | 177 | 236 | 229 | 158 | 387 | 297 | 222 | 196 | 166 | 75 | 72 | 84 | 149 | 76 | 129 | 71 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 1:30PM0.72m | 1:48AM0.38m | 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 | ||||||||
Low Tide | 8:36PM0.05m | 7:34AM0.03m | 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 | ||||||||
6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | |
mm | 2 | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 27 | 28 | 27 | 27 | 28 | 27 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 26 | 29 | 30 | 31 | 30 | 29 | 25 | 25 | 23 | 24 | 25 | 24 | 24 | 26 | 24 | 25 | 26 | 27 | 27 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | SSW 12 | SW 16 | ENE 11 | ENE 11 | ENE 10 | E 10 | ENE 10 | NE 9 | ENE 6 | NE 8 | NE 8 | NE 8 | E 8 | E 8 |
785 | 466 | 378 | 194 | 140 | 177 | 141 | 121 | 268 | 387 | 297 | 222 | 196 | 166 | 75 | 59 | 72 | 57 | 57 | 40 | 71 | |
Swell 2 Height (m) Direction Period (s) | W 10 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | NE 8 | ENE 9 | NE 8 | SSW 15 | SW 14 | E 8 | SW 22 | NE 8 |
539 | 650 | 137 | 269 | 257 | 156 | 131 | 101 | 93 | 261 | 229 | 226 | 242 | 74 | 46 | 72 | 84 | 100 | 30 | 227 | 67 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | W 8 | SSW 14 | SSW 8 | E 13 | SSW 13 | SSW 16 | SW 18 | S 12 | SSW 11 | NNE 8 | NNE 7 | NNE 8 | SSW 16 | SSW 13 | SW 15 | SW 12 | SW 24 | SSW 14 | SW 14 | SW 21 |
474 | 130 | 356 | 58 | 166 | 176 | 181 | 154 | 67 | 43 | 32 | 30 | 47 | 99 | 68 | 107 | 23 | 87 | 76 | 49 | 224 | |
Wind waves Height (m) Direction Period (s) | SSW 10 | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | ENE 5 | — | ENE 6 | ENE 8 | NE 5 | NE 8 | — |
1042 | — | — | — | — | — | 236 | 229 | 158 | 88 | — | — | — | — | 30 | — | 68 | 149 | 41 | 129 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 96 | 7 | 3 | 5 | 16 | 5 | 47 | 18 | 16 | 16 | 16 | 16 | 42 | 16 | 47 | 47 | 5 | 5 | 16 | 18 | 18 |
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.










