
Surf Forecasts:
Sandy Beach surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 11PM (local time) - 5ft (1.5m), 10s period, ENE swell with 462 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 10s period with ENE swell.
Best Forecast Surf Conditions for Sandy Beach this week:
The surf forecast for Sandy Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.3m and 10s. Another secondary swell of 0.9m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sandy Beach in the next 16 days are 1.5m 10s and forecast to arrive on Tuesday (Sep 08) at 11PM. 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 (Sep 11) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 4.5ft (1.3m) 10s |
| Best Surf | 5AM (Wed 9th Sep) | 4.5ft (1.3m) 10s |
| Most Powerful | 11PM (Tue 8th Sep) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cooking for Sandy Beach.
Straight up, I’m gonna be honest with you – this 16-day window is looking pretty grim. We’ve got a real flat spell on our hands. The first bit of surf that’s even worth mentioning doesn’t show up until Tuesday afternoon, the 8th of September, and even then, it’s a struggle. From there, it’s a long, dry run of poor conditions until the very end of the forecast. Let’s break it down.
Tuesday afternoon, the 8th, we see a 6 ft swell rolling in from the ENE with a period of 11 seconds. That’s a moderate groundswell, giving us some decent energy (1127). But the wind is a cross-shore from the SW at 12 mph, and the wave comment says it’s marginal. It’s not going to be clean, and the water temp is a warm 81°F, which is pretty average for this time of year. Honestly, for a spot like Sandy Beach that’s exposed to the ESE, this swell direction isn’t ideal, and the conditions are messy. It’s a tough one to recommend.
Wednesday the 9th through to the end of the first week is a write-off. We’ve got tiny 1 ft to 4 ft swell, choppy winds, and everything is marked as poor surf. The energy drops right off, with combined energy values falling to triple and even double digits – as low as 84 by the 14th. It’s just not happening.
The second week doesn’t offer much hope either. From the 15th onwards, we start seeing a bit more size again, but the wind is relentless. It’s a constant cross or cross-onshore breeze from the ENE at 15 to 22 mph, and later on, even 25 mph. The swell is often short period, like 6 to 8 seconds, which is just windswell junk. The wave comment stays stuck on “poor surf conditions” right through to the 23rd.
There is a little spike of energy on the 16th, Wednesday afternoon, with a 3 ft swell from the SSW at a very long 18 seconds, giving us 882 combined energy. But the wind is cross-onshore and choppy. A long period SSW groundswell like that, with the wrong wind at Sandy Beach, is just a messy, blown-out lineup. Not worth paddling out for.
The absolute standout, if you can call it that, is a brief moment on the 18th, Friday morning. We’ve got a 6 ft swell from the E at 9 seconds, with combined energy of 859. That’s a solid amount of water moving around. But again, the wind is a fresh cross-shore at 22 mph, creating a lumpy cross-chop. For a beach and reef set-up, this is more of a kitesurfing kind of day than a clean paddle session. The swell is big enough that beginners should stay well clear, and the chop will make it a battle for everyone else.
Honestly, gang, there’s no hidden gem here. The combination of poor wind, wrong swell directions, and short-period swell just doesn’t line up. For a break that’s fairly consistent, this is a frustrating stretch. But forecasts can change, and it tends not to stay this poor for too long.
Stay tuned, and keep your board waxed for the next window.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Wed night. Warm (max 28°C on Tue afternoon, min 25°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the ENE by Thu afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Fri afternoon). Wind will be generally light. | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | SSW 13 |
Wave Graph | ||||||||||||||||||||
650 | 378 | 269 | 257 | 177 | 231 | 186 | 136 | 314 | 249 | 292 | 128 | 98 | 75 | 75 | 84 | 81 | 69 | 55 | 68 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 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 | |||||||
— | — | 6:16 | — | — | 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 | — | — | — | — | 5 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 28 | 30 | 30 | 28 | 29 | 26 | 25 | 24 | 24 | 24 | 25 | 26 | 24 | 24 | 25 | 25 | 25 | 26 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | ENE 7 | SSW 13 | SW 16 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NE 9 | NE 9 | ENE 8 | NE 9 | NE 8 | NE 8 | NE 8 |
477 | 378 | 194 | 140 | 177 | 231 | 129 | 268 | 314 | 249 | 292 | 128 | 98 | 75 | 75 | 75 | 81 | 69 | 55 | 53 | |
Swell 2 Height (m) Direction Period (s) | 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 9 | E 5 | E 5 | NE 9 | SW 12 | SW 14 | SW 22 | SW 21 |
650 | 137 | 269 | 257 | 156 | 131 | 101 | 93 | 261 | 229 | 226 | 242 | 77 | 14 | 29 | 79 | 38 | 49 | 227 | 224 | |
Swell 3 Height (m) Direction Period (s) | W 8 | SSW 14 | E 13 | E 13 | SSW 13 | E 12 | SW 18 | S 12 | NNE 8 | NNE 8 | SSW 11 | NE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | SW 14 | SW 23 | SW 14 | SSW 13 |
130 | 356 | 168 | 166 | 176 | 104 | 154 | 67 | 37 | 39 | 23 | 54 | 124 | 68 | 107 | 84 | 54 | 86 | 49 | 68 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ENE 7 | ENE 7 | — | — | — | — | — | — | — | ENE 6 | ENE 6 | ENE 5 | ENE 5 | ENE 5 |
— | — | — | — | — | — | 186 | 136 | — | — | — | — | — | — | — | 33 | 42 | 29 | 29 | 42 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 7 | 3 | 5 | 14 | 5 | 47 | 47 | 16 | 16 | 16 | 14 | 23 | 16 | 16 | 16 | 16 | 16 | 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.










