Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 7 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
26.9° C
0.4° 

Sandy Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Sandy Beach surf forecast from 9 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 8PM (local time) - 10ft (3.0m), 11s period, ENE swell with cross-shore winds.
  • Most powerful swell: Sunday 16 Aug, 2PM (local time) - 11ft (3.5m), 13s period, ENE swell with 4,072 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 8PM (local time) - 10ft (3.0m), 11s 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 Saturday (Aug 15) at 8PM. The primary swell is predicted to be 3.0m and 11s period with a secondary swell of 0.8m and 13s. Another secondary swell of 0.3m and 18s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Sandy Beach in the next 16 days are 3.5m 13s and forecast to arrive on Sunday (Aug 16) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 12s period and expected on Thursday (Aug 13) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sat 15th Aug)10ft (3.0m) 11s
Best Surf 8PM (Sat 15th Aug)10ft (3.0m) 11s
Most Powerful 2PM (Sun 16th Aug)11ft (3.5m) 13s

Table - best surf conditions forecast for Sandy Beach over the next 16 days.


The Lowdown

Yeah, look, I’m not gonna sugarcoat it. The next couple of weeks are looking pretty grim for a proper paddle. We’ve got a lot of wind and lumpy, messy conditions on the menu for the most part, and not a whole lot of quality. But, there is one window, one real standout moment, that’s got me a bit fired up. Let’s break it down.

For the first stretch, from now through the 15th, it’s a write-off. The surf is there, but it’s small and the wind is just killing it. We’re talking cross-shore breezes in the 18 to 22 mph range, which is whipping up a horrible cross-chop. The swell is mostly short-period windswell, around 7 to 8 seconds, and the energy is weak to moderate. The combined energy figures are mostly in the 400 to 900 range, which tells you it’s just not powerful or organized. The water temp is 80°, which is about normal for this time of year, so at least you won’t be cold while you’re getting frustrated.

Then we get to the weekend, and things get interesting. Sunday the 16th is the one to circle. The swell is going to jump up, with a solid 10ft to 12ft on offer, coming from the ENE. The period is a solid 13 seconds, so there’s real push behind it. The winds are due to swing around to a cross-offshore from the N and NNE, which will finally clean things up. The combined energy readings are massive, hitting 3486 and 4836, which is strong to very strong. This is a serious groundswell. Now, here’s the catch, and it’s a big one. This size is way too big for Sandy Beach (Big Island). It’s going to be a heavy, expert-only situation. For most of us, it’s a beach day, not a surf day. It’s a shame, because the conditions look perfect otherwise.

After that pulse, it’s back to the grind. From the 17th through the 24th, we’re back to the same story. The swell drops, the wind comes back onshore or cross-shore, and the quality tanks. The combined energy drops back down to the 200-900 range, and we’re dealing with short-period, weak swell again. There’s a risk of thunderstorms on the 23rd, with lumpy conditions. It’s just a whole lot of nothing, to be honest.

So, the outlook is simple. The first week is a write-off, and the second week is more of the same. If you’re an expert, the 16th might be your chance to get some serious slabs, but it will be big and powerful, and not for the faint-hearted. The setup there looks far more interesting for the kite crew than for the paddle crew until that Sunday comes. For everyone else, it’s a waiting game. The lack of consistent quality is a bummer, but things can change, so keep an eye on the charts.

Rusty

Short Range Forecast

Mostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Wed night, min 25°C on Wed morning). Mainly fresh winds.

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
ENE
7
1.7
ENE
7
1.7
ENE
7
1.4
ENE
7
1.5
ENE
8
1.4
ENE
7
1.3
ENE
7
0.8
SSW
14
0.6
S
20
0.9
S
18
0.9
S
18
1
S
16
1
S
16
1.2
S
15
1.1
S
15
1
S
14
1.8
ENE
8
2
ENE
9
2.2
ENE
11
2.5
ENE
11
3
E
13
Wave Graph
Metric surfscale
Energy kJ
225
305
310
220
246
214
181
269
276
509
498
520
501
653
537
411
411
617
1111
1456
2914
Wind (km/h)
35
NE
30
NE
30
ENE
30
NE
30
ENE
25
ENE
30
ENE
35
ENE
25
ENE
35
ENE
35
ENE
30
ENE
35
NE
35
NE
35
ENE
35
ENE
35
ENE
30
NE
35
ENE
35
NE
25
NE
Wind State
cross
cross
cross-on
cross
cross
cross-on
cross-on
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
1:10PM0.77m
1:01AM0.23m
1:55PM0.79m
1:52AM0.27m
2:36PM0.79m
2:40AM0.31m
3:14PM0.76m
3:27AM0.36m
3:49PM0.71m
4:15AM0.41m
4:22PM0.64m
5:04AM0.45m
4:53PM0.55m
Low Tide
8:50PM0.08m
6:37AM-0.03m
9:21PM0.06m
7:31AM-0.04m
9:52PM0.05m
8:22AM-0.02m
10:21PM0.04m
9:11AM0.01m
10:50PM0.04m
10:01AM0.07m
11:17PM0.04m
10:54AM0.13m
11:44PM0.05m
part cloud
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:04
7:02
7:02
7:01
7:00
7:00
 mm
Temp °C
25
25
25
26
26
26
26
26
25
25
25
26
26
26
26
26
26
26
26
26
26
Feels °C
24
23
24
26
24
25
25
24
23
23
22
24
24
23
23
23
23
24
25
25
25
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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