Turtles Reef surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 pm Monday 18 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Turtles Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Turtles Reef sea temperature is
25.5° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Turtles Reef this week:

The surf forecast for Turtles Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 8PM. The primary swell is predicted to be 0.8m and 14s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Turtles Reef in the next 16 days are 0.9m 18s and forecast to arrive on Tuesday (May 19) at 5AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Thursday (May 21) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Mon 18th May)2.5ft (0.8m) 14s
Best Surf 5AM (Tue 19th May)3ft (0.9m) 18s
Most Powerful 5AM (Tue 19th May)3ft (0.9m) 18s

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


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.

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Thu afternoon, min 22°C on Thu night). Mainly fresh winds.

Mon
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
1
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)
0.8
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
15
0.7
SSW
15
0.6
SSW
14
0.6
SSW
14
0.5
S
16
0.5
S
16
0.5
S
16
0.6
S
15
0.5
S
14
0.4
S
18
0.6
S
16
0.6
S
16
0.7
S
15
0.6
S
15
0.5
S
13
0.5
S
14
0.6
S
14
0.6
S
14
Wave Graph
Metric surfscale
Energy kJ
213
161
229
246
222
163
149
137
134
126
157
107
97
188
181
215
155
92
93
142
142
Wind (km/h)
25
E
20
ENE
15
ENE
25
ENE
25
ENE
30
ENE
30
ENE
30
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
35
ENE
30
ENE
30
ENE
30
E
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
8:01AM0.20m
8:22PM0.66m
10:01AM0.25m
9:15PM0.60m
11:31AM0.34m
10:06PM0.53m
12:27PM0.43m
10:55PM0.47m
1:08PM0.51m
Low Tide
1:40AM0.14m
10:27AM0.02m
2:45AM0.14m
11:14AM0.07m
3:42AM0.13m
12:10PM0.14m
4:27AM0.12m
1:30PM0.22m
5:03AM0.11m
3:27PM0.28m
5:32AM0.09m
5:26PM0.31m
5:58AM0.08m
part cloud
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:52
5:50
5:50
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:05
7:05
7:06
7:06
7:07
7:07
7:07
Temp °C
26
24
26
27
25
25
26
23
25
25
23
25
25
23
25
25
23
25
25
23
25
24
23
27
26
25
23
23
20
21
21
19
20
20
19
21
20
19
21
21
20
22
Swell 1
Height (m)
Direction
Period (s)
1.3
E
8
1
E
8
1
E
8
1
E
8
0.7
SSW
15
0.6
SSW
14
0.6
SSW
14
0.5
NNW
10
0.5
S
16
0.5
S
16
0.6
S
15
0.5
S
14
0.5
S
14
1.9
ENE
8
0.6
S
16
0.7
S
15
0.6
S
15
0.6
NNW
12
0.6
NNW
12
0.6
S
14
0.7
NNE
8
Energy kJ
223
130
134
131
222
163
149
56
134
126
157
107
94
460
181
215
155
101
94
142
64
Swell 2
Height (m)
Direction
Period (s)
0.8
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
15
0.6
NNW
11
0.6
NNW
10
0.6
NNW
11
0.5
S
16
0.4
SSW
14
0.4
SE
13
0.4
SE
13
0.4
NNW
10
0.4
NNW
11
0.6
S
16
0.4
NNW
10
0.4
NNW
15
0.6
NNW
13
0.5
S
13
0.5
S
14
0.6
NNW
11
0.6
S
14
Energy kJ
213
161
229
246
75
69
75
137
74
44
41
38
45
188
40
85
120
92
93
84
142
Swell 3
Height (m)
Direction
Period (s)
0.5
SSE
7
0.4
SSE
7
0.6
SSW
18
0.4
SSE
7
0.4
SSE
9
0.3
SSW
18
0.4
SE
7
0.4
SSW
13
0.4
NW
10
0.3
NNW
10
0.4
NW
10
0.4
SE
12
0.4
S
18
0.5
NW
11
0.4
SE
12
0.4
NNW
10
0.4
NW
10
0.3
S
16
0.3
S
16
0.2
SSE
11
0.5
NW
11
Energy kJ
26
18
207
18
33
63
12
67
24
19
27
37
97
56
35
40
24
46
46
11
58
Wind waves
Height (m)
Direction
Period (s)
1.1
ENE
8
1.4
ENE
8
1.3
ENE
8
1.5
E
8
1.6
E
8
1.9
E
8
2
E
8
2.3
E
8
2.1
E
8
2
E
8
2.1
ENE
8
1.9
ENE
8
1.9
ENE
8
2.1
ENE
8
2
ENE
8
1.7
ENE
8
1.5
E
8
1.1
E
7
Energy kJ
138
232
218
287
343
493
533
709
637
562
547
463
468
520
460
373
258
131
Nearest Offshore or Glassy
Rating
(10 max)
2
1
2
2
1
2
2
1
1
1
2
1
3
1
1
2
3
1
1
2
1
Distance (km)
9
0
0
9
1
9
17
20
159
159
20
158
170
157
160
170
20
158
153
10
9
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
2
2
2
1
2
3
2
2
Best forecast wave conditions in United States
Rating
(10 max)
3
5
3
3
4
3
2
2
2
1
3
2
3
2
1
2
3
1
1
2
2
Header Global
Rating
(10 max)
4
4
4
5
5
4
4
4
4
5
5
7
4
8
7
5
5
4
5
4
5
  • 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 Turtles Reef Surf forecast

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

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

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