Rockpiles surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 pm Sunday 17 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Rockpiles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rockpiles sea temperature is
25.5° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Rockpiles this week:

The most powerful waves expected at Rockpiles in the next 16 days are 3.0m 8s and forecast to arrive on Thursday (May 21) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 11s period and expected on Wednesday (May 20) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 21st May)10ft (3.0m) 8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Sun night. Warm (max 25°C on Sun night, min 23°C on Tue night). Winds increasing (light winds from the ENE on Sun night, strong winds from the ENE by Wed afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 24°C on Thu morning, min 23°C on Wed night). Mainly strong winds.

Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sun
24
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
3
1
1
1
1
1
1
0
0
1
1
1
1
1
0
1
0
0
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
ENE
8
1.6
ENE
8
1.6
ENE
8
1.5
ENE
8
0.6
SSW
18
0.8
SSW
15
1.7
ENE
8
2.1
ENE
8
2.2
ENE
8
2.5
ENE
8
3
ENE
8
3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.4
ENE
8
2.5
ENE
8
2.3
ENE
8
2.1
ENE
8
2.5
ENE
8
2.3
ENE
8
2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
485
341
322
259
218
259
361
534
646
850
1026
1026
1048
887
801
935
748
626
850
722
560
Wind (km/h)
20
ENE
35
ENE
35
ENE
25
ENE
30
ENE
35
ENE
35
ENE
45
ENE
40
ENE
40
ENE
45
ENE
45
ENE
40
ENE
40
ENE
40
ENE
35
ENE
40
ENE
40
ENE
35
ENE
40
ENE
40
ENE
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
4:50AM0.11m
5:59PM0.73m
5:55AM0.09m
6:52PM0.69m
7:16AM0.09m
7:47PM0.64m
8:55AM0.12m
8:43PM0.58m
10:30AM0.18m
9:37PM0.51m
11:42AM0.26m
10:30PM0.44m
12:35PM0.34m
Low Tide
00:43AM-0.00m
10:08AM-0.12m
1:48AM-0.01m
10:55AM-0.08m
2:50AM-0.02m
11:49AM-0.02m
3:46AM-0.03m
12:55PM0.05m
4:33AM-0.04m
2:25PM0.11m
5:12AM-0.05m
4:11PM0.16m
5:45AM-0.05m
5:51PM0.17m
rain showers
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:50
5:50
5:50
5:50
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:04
7:04
7:04
7:05
7:05
7:06
1
Temp °C
25
24
24
24
24
25
24
24
24
23
24
24
23
24
24
23
24
24
23
24
24
26
24
21
22
23
22
21
21
19
18
19
19
17
18
19
18
19
18
18
19
19
Swell 1
Height (m)
Direction
Period (s)
1.6
ENE
8
1.6
ENE
8
0.7
SSW
14
1.5
ENE
8
1.3
ENE
8
0.8
SSW
15
0.6
SSW
15
0.6
SSW
14
0.5
SSW
14
0.4
SSW
13
0.4
SSW
16
0.5
S
16
0.5
S
15
0.5
S
14
0.4
SSW
14
0.5
S
16
0.6
S
16
0.6
S
15
0.6
S
15
0.5
S
14
0.5
S
13
Energy kJ
350
341
168
259
218
246
172
163
108
68
87
127
110
107
62
130
181
159
155
93
92
Swell 2
Height (m)
Direction
Period (s)
0.7
SSW
14
0.7
SSW
14
0.4
SSW
19
0.7
SSW
14
0.7
SSW
14
0.3
SSE
6
0.4
NW
11
0.3
NNW
10
0.3
NNW
11
0.4
SSW
16
0.4
SSW
13
0.2
SSE
13
0.3
SSE
13
0.4
S
18
0.4
S
18
0.4
SSW
13
0.3
SSW
13
0.2
SSE
12
0.2
NNW
13
0.4
NW
12
0.3
NW
12
Energy kJ
186
180
148
161
175
8
30
21
23
91
59
17
32
101
97
59
34
14
18
39
23
Swell 3
Height (m)
Direction
Period (s)
0.4
SSE
7
0.6
SSW
19
0.3
SSE
7
0.4
SSW
16
0.6
SSW
18
0.3
NNW
12
0.3
SSE
9
0.3
SSW
18
0.3
SSW
18
0.2
NNW
11
0.2
SSE
13
0.3
SSW
12
0.2
S
12
0.3
SSE
12
0.2
SSE
12
0.2
SSE
12
0.2
SSE
12
0.2
NNW
10
0.2
SSE
11
0.3
S
16
0.3
S
16
Energy kJ
15
251
9
91
207
27
17
63
61
11
17
28
11
29
14
14
14
10
12
46
46
Wind waves
Height (m)
Direction
Period (s)
1.9
ENE
8
1.6
ENE
8
1
ENE
7
1.5
ENE
8
1.7
ENE
8
2.1
ENE
8
2.2
ENE
8
2.5
ENE
8
3
ENE
8
3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.4
ENE
8
2.5
ENE
8
2.3
ENE
8
2.1
ENE
8
2.5
ENE
8
2.3
ENE
8
2
ENE
8
Energy kJ
485
322
104
259
361
534
646
850
1026
1026
1048
887
801
935
748
626
850
722
560
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
1
2
2
2
2
1
1
2
2
2
1
3
1
1
1
1
1
1
Distance (km)
1
30
31
30
30
38
30
41
47
48
44
258
47
129
200
127
127
129
38
38
127
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
2
2
2
2
1
1
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
5
3
4
3
3
2
4
3
1
3
4
2
3
2
3
2
3
1
3
2
4
Header Global
Rating
(10 max)
5
4
4
4
4
4
5
5
5
5
4
4
5
5
5
5
7
5
5
5
4
  • 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 Rockpiles Surf forecast

The above surf forecast table for Rockpiles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rockpiles can be found by selecting the local surf guide option on the grey menu. Our Rockpiles 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 (Rockpiles) 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 Rockpiles 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.

Rockpiles is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.

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