
Surf Forecasts:
Sandy Beach surf forecast from 6 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.3m), 16s period, S swell with 890 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 1.3m 16s and forecast to arrive on Thursday (Aug 13) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 14s period and expected on Thursday (Aug 06) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 13th Aug) | 4.5ft (1.3m) 16s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – Sandy Beach is looking like a write-off for the next couple of weeks. This stretch is a classic exposed beach and reef setup, and it’s getting hammered by persistent cross-shore winds that are just wrecking any chance of clean waves. We’ve got no standouts to speak of, so we’re looking at a long gap in quality surf from now all the way through.
The pattern starts off with some tiny, weak 1ft SSW swell on Thursday the 6th and Friday the 7th, but it’s completely useless. The cross-shore wind is already on it, and the wave energy is moderate at best (around 218). The water’s sitting at a warm 80°, which is pretty average for the time of year, so no surprises there.
Then we hit a shift from Saturday the 8th through to Wednesday the 12th. The swell size bumps up to a messy 5ft to 6ft, but it’s short-period windswell (6-8 seconds) coming from the ENE. The wind stays cross-shore and fresh, creating lumpy, chopped-out conditions. The combined energy climbs into the moderate range (338 to 630), but it’s not doing you any favours – it’s just a bumpy, crumbly mess.
Mid-week on the 12th, there’s a spike in longer-period groundswell from the S and SSW, hitting 3ft at 18 seconds. The energy gets strong (859 to 931), and that long period means the waves would have some push, but the cross-shore wind kills the shape. For a beach and reef spot like this, that long-period groundswell tends to close out or break too straight anyway. Not worth the paddle.
From Thursday the 13th right through to the 21st, it’s the same story. The swell builds into the 8ft to 12ft range by the weekend of the 15th and 16th, with energy levels going through the roof (over 1500). But with 22 to 28 mph cross-shore winds, it’s going to be a washing machine out there. That’s expert-only territory in terms of size, and the chop will make it a battle. Honestly, this setup looks more interesting for kite surfing than paddle surfing for most of that period.
The very end of the run, around Thursday the 21st, drops back to small 2ft to 2ft SSW groundswell, but the cross-shore wind hasn’t let up. It’s just more of the same – poor.
So, bottom line: there’s no surf worth chasing at Sandy Beach in this 16-day window. It’s a blank run, and for this area, that’s not totally unusual when the trade winds lock in. Stay patient, forecasts can change, but for now, save your energy.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 25°C on Thu morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 14 | ENE 8 | SSW 14 | SSW 14 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | SSW 14 | SSW 14 | S 20 | S 18 | S 18 | S 16 |
Wave Graph | |||||||||||||||||||||
81 | 80 | 107 | 77 | 73 | 148 | 207 | 201 | 270 | 261 | 340 | 286 | 210 | 204 | 193 | 165 | 269 | 373 | 515 | 620 | 890 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 10:22AM0.61m | 8:39PM0.22m | 11:25AM0.67m | 10:36PM0.19m | 12:21PM0.73m | 00:00AM0.20m | 1:10PM0.77m | 1:01AM0.23m | 1:55PM0.79m | 1:52AM0.27m | 2:36PM0.79m | 2:40AM0.31m | 3:14PM0.76m | 3:27AM0.36m | |||||||
Low Tide | 6:43PM0.21m | 3:25AM0.02m | 7:38PM0.16m | 4:32AM0.00m | 8:16PM0.11m | 5:38AM-0.02m | 8:50PM0.08m | 6:37AM-0.03m | 9:21PM0.06m | 7:31AM-0.04m | 9:52PM0.05m | 8:22AM-0.02m | 10:21PM0.04m | ||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 26 |
Feels °C | 25 | 26 | 24 | 25 | 24 | 23 | 24 | 24 | 22 | 23 | 24 | 23 | 25 | 25 | 24 | 25 | 24 | 24 | 23 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | SW 14 | ENE 7 | NE 7 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | SSW 16 | ENE 8 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 |
59 | 42 | 102 | 21 | 25 | 105 | 113 | 101 | 99 | 159 | 86 | 198 | 210 | 176 | 186 | 165 | 269 | 243 | 515 | 620 | 890 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | S 11 | SSW 14 | SSW 14 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 15 | SSW 11 | SSE 9 | SSE 9 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSE 9 |
81 | 80 | 21 | 77 | 73 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 184 | 42 | 32 | 30 | 29 | 373 | 218 | 218 | 8 | |
Swell 3 Height (m) Direction Period (s) | SSE 11 | S 11 | NNW 7 | SW 21 | SW 20 | NE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SSE 10 | SSW 12 | SSE 10 | SSW 11 | SSW 11 | S 21 | W 13 | SSE 9 | W 12 | W 12 |
25 | 22 | 5 | 115 | 99 | 30 | 18 | 19 | 19 | 19 | 102 | 19 | 56 | 35 | 23 | 40 | 79 | 30 | 15 | 11 | 11 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 |
53 | 50 | 107 | 35 | 46 | 135 | 207 | 201 | 270 | 261 | 340 | 286 | 77 | 204 | 193 | 160 | 167 | 139 | 111 | 93 | 122 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 18 | 16 | 47 | 47 | 47 | 49 | 55 | 49 | 47 | 48 | 47 | 47 | 18 | 19 | 47 | 19 | 19 | 47 | 47 | 47 |
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.











