Power Plant surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 pm Monday 18 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Power Plant surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Power Plant sea temperature is
25.5° C
(Which is normal for this time of year)

How big are the waves at Power Plant today?

The current surf forecast for Power Plant at 7PM is: 0.8m 14s primary swell from a South-southwest direction (forecast issued at 01:00pm May 18). An open ocean swell of 1.2m 8s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (HST) & DateWave HeightWave Period
Morning (18 May)2.5ft (0.8m)14s
Afternoon (18 May)2ft (0.6m)19s
Evening (18 May)2.5ft (0.8m)14s

Table - waves today at Power Plant. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 27°C on Tue afternoon, min 23°C on Wed night). Mainly fresh winds.

Mon
18
Tuesday
19
Wednesday
20
Thu
21
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
Rating
(10 max)
2
1
0
1
1
1
2
2
2
1
0
2
2
1
1
1
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.7
SSW
19
0.6
SSW
19
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.9
SSW
18
0.7
SSW
18
0.8
SSW
14
0.8
SSW
14
0.8
SSW
15
0.8
SSW
15
0.8
SSW
15
0.7
SSW
15
0.8
SSW
14
0.8
SSW
14
0.6
SSW
14
0.6
SSW
14
0.6
SSW
14
0.5
SSW
14
0.4
SSW
17
0.5
S
16
0.5
S
16
0.5
S
16
Wave Graph
Metric surfscale
Energy kJ
332
251
213
210
207
161
480
273
229
236
246
252
242
222
233
236
163
158
149
105
101
137
135
134
Wind (km/h)
20
ENE
25
E
25
E
20
ENE
15
ENE
20
ENE
15
ENE
15
ENE
15
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
20
ENE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
High Tide
5:43PM0.81m
5:06AM0.20m
6:35PM0.78m
6:18AM0.19m
7:28PM0.72m
Low Tide
9:45AM-0.02m
1:40AM0.14m
10:27AM0.02m
2:45AM0.14m
11:14AM0.07m
3:42AM0.13m
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:05
7:05
7:06
Temp °C
26
26
26
24
24
24
24
24
26
27
26
25
24
24
24
24
25
26
25
23
23
23
23
23
26
24
24
23
24
24
24
25
27
26
24
25
23
23
24
23
23
23
22
20
20
20
20
20
Swell 1
Height (m)
Direction
Period (s)
1.2
E
8
1.2
E
8
1.3
E
8
1.2
E
8
1.1
E
8
1
E
8
1
E
8
1
E
8
1
E
8
0.9
ENE
8
1
E
8
0.8
SSW
15
0.8
SSW
15
0.7
SSW
15
0.8
SSW
14
0.8
SSW
14
0.6
SSW
14
0.6
SSW
14
0.6
SSW
14
0.5
SSW
14
0.5
NNW
10
0.5
NNW
10
0.5
SSW
13
0.5
S
16
Energy kJ
190
190
223
187
157
130
131
131
134
109
131
252
242
222
233
236
163
158
149
105
63
56
101
134
Swell 2
Height (m)
Direction
Period (s)
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.9
SSW
18
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.8
SSW
15
0.6
NNW
11
0.6
NNW
11
0.6
NNW
11
0.7
NNW
10
0.5
NW
10
0.6
NNW
10
0.7
NNW
10
0.6
NNW
11
0.5
NNW
11
0.5
SSW
13
0.5
S
16
0.5
S
16
0.5
SSW
13
Energy kJ
233
229
213
210
207
161
480
226
229
236
246
76
78
75
94
49
69
95
75
64
101
137
135
101
Swell 3
Height (m)
Direction
Period (s)
0.7
SSW
19
0.6
SSW
19
0.5
SSE
7
0.4
SSE
7
0.4
SSE
6
0.4
SSE
7
0.4
SSE
7
0.7
SSW
18
0.6
SSW
18
0.6
NNW
12
0.4
SSE
7
0.4
SSE
6
0.4
SSE
9
0.4
SSE
9
0.4
SSE
9
0.4
SSE
9
0.3
SSW
18
0.3
SSW
18
0.4
SE
7
0.3
SSW
18
0.4
SSW
17
0.4
SSW
13
0.4
NNW
10
0.4
NNW
10
Energy kJ
332
251
26
17
16
18
18
273
207
91
18
16
35
33
32
32
63
62
12
61
99
67
38
38
Wind waves
Height (m)
Direction
Period (s)
1.4
ENE
8
1.3
ENE
8
1.1
ENE
8
1
ENE
8
1.4
ENE
8
1.2
ENE
8
1.2
ENE
8
1.3
ENE
8
1.3
E
8
1.3
E
8
1.5
E
8
1.7
E
8
1.6
E
8
1.7
E
8
1.8
E
8
1.9
E
8
2
E
8
2.1
E
8
Energy kJ
264
196
138
113
232
187
187
218
217
223
287
368
343
396
422
493
529
569
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
1
1
1
2
2
2
1
2
2
2
1
1
2
2
2
2
2
1
1
1
1
Distance (km)
0
8
8
0
0
0
0
0
0
0
8
0
0
0
0
8
8
15
16
16
19
20
158
19
Best forecast wave conditions in Oahu
Rating
(10 max)
3
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
3
4
4
4
3
4
3
3
3
4
4
5
4
3
2
3
2
4
4
2
3
3
1
Header Global
Rating
(10 max)
4
4
4
4
4
4
4
4
5
5
5
5
4
5
4
5
5
4
4
5
4
4
4
4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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