Surf Forecasts:
Sandy Beach surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 8AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 2.5ft (0.8m), 19s period, SSW swell with 480 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 8AM (local time) - 3ft (0.9m), 14s period with SSW 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 8AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.2m and 9s. 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 0.8m 19s and forecast to arrive on Tuesday (Sep 15) 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+) | 8AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Best Surf | 8AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Most Powerful | 11PM (Tue 15th Sep) | 2.5ft (0.8m) 19s |
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 menu for Sandy Beach.
Alright, it’s a bit of a rough stretch for Sandy Beach to be honest. The water’s sitting at 81°, which is bang on average for this time of year. The first sniff of anything rideable is Wednesday morning, September 9th, with a small 3ft swell from the SSW, but the wind is a light cross-shore, so it’s not totally blown out. The energy is moderate at 631. It’s marginal though, and the tide might be a pain. The rest of that week and into the next is a write-off - there’s a full week of poor conditions with moderate to fresh cross and cross-onshore winds, and the swell is mostly small and weak. Thursday September 10th through to the following Tuesday, September 15th, the surf quality is just not there. It’s a big gap of no good options.
Now, the real standout is a long way off, but it’s a promise. Check out Wednesday afternoon, September 16th. A 3ft swell from the SSW, but the period jumps to 18 seconds – that’s a proper groundswell. The energy is moderate to strong at 664. The wind is a moderate cross-shore, so it’ll be lumpy but with those long lines, it could be worth a look for the more experienced crew. The real highlight, though, is on the morning of Thursday, September 18th. We’ve got a 3ft SSW groundswell with a 17-second period, and the combined energy is strong at 1117. That’s got some serious push for a beach break. The wind is still a fresh cross-shore, so it won’t be glassy, but it’ll be a lot more interesting than the flat spell we’ve had. This is the best on offer, but it’s a week and a half out, so keep an eye on it.
The setup at Sandy Beach is exposed, and the optimum swell direction is ESE, but the best swells are coming from the SSW, which isn’t a perfect match. For a beach and reef, that long period will make the waves stand up nicely, but the crowds are often here, so expect company. The later part of the forecast, from September 22nd onward, sees some bigger swell – 7ft plus – but the wind is still cross-onshore and gusty, making it a messy, choppy affair. It’s more of a kite-surfing day than a clean paddle session.
So, for the keen, the window is around September 16th to 18th. The rest is a long wait.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Wed night. Warm (max 27°C on Wed morning, min 25°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the ENE by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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 14 | SSW 13 | E 13 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 11 | ENE 10 | E 10 | ENE 10 | SSW 13 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | SSW 13 | NE 8 | NE 7 | SSW 19 |
Wave Graph  | |||||||||||||||||||||
 kJ | 269 | 257 | 176 | 237 | 183 | 136 | 331 | 265 | 245 | 122 | 98 | 99 | 78 | 84 | 79 | 74 | 132 | 68 | 113 | 136 | 470 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross |
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 | — | — | 6:16 | — | — |
 | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — |
mm | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 30 | 29 | 29 | 27 | 25 | 26 | 24 | 24 | 25 | 25 | 24 | 24 | 25 | 25 | 24 | 24 | 25 | 25 | 28 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | ENE 8 | ENE 8 | E 12 | ENE 7 | SW 16 | ENE 11 | SW 15 | ENE 10 | E 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | SW 22 | NE 8 | SW 20 | SW 19 | NE 7 |
| kJ | 194 | 120 | 128 | 141 | 183 | 268 | 331 | 229 | 245 | 122 | 77 | 77 | 77 | 75 | 79 | 74 | 227 | 32 | 392 | 384 | 100 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | E 13 | SSW 13 | SSW 13 | E 11 | SW 16 | NNE 8 | SW 15 | SW 15 | ENE 10 | ENE 9 | E 9 | ENE 5 | SSW 13 | SW 14 | ESE 5 | SW 21 | SW 13 | SW 12 | SSW 19 |
| kJ | 269 | 257 | 156 | 131 | 129 | 93 | 261 | 39 | 226 | 242 | 98 | 64 | 78 | 23 | 62 | 49 | 9 | 224 | 41 | 38 | 470 |
Swell 3 Height (m) Direction Period (s) | E 13 | E 13 | SSW 13 | SSW 16 | E 12 | S 12 | NNE 8 | SSW 12 | SSW 11 | NE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | ENE 8 | SW 23 | SW 14 | SSW 13 | WSW 8 | WSW 8 | E 7 |
| kJ | 168 | 166 | 176 | 181 | 101 | 69 | 26 | 46 | 23 | 70 | 124 | 99 | 107 | 84 | 14 | 86 | 49 | 68 | 6 | 6 | 24 |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 7 | — | ENE 7 | — | ENE 11 | E 5 | — | — | — | — | — | ENE 5 | ENE 5 | NE 8 | ENE 5 | NE 8 | NE 7 | — |
| kJ | — | — | — | 237 | — | 136 | — | 265 | 11 | — | — | — | — | — | 42 | 28 | 132 | 32 | 113 | 136 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 14 | 5 | 48 | 47 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 5 | 5 | 15 | 5 |
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.
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