Turtles Reef surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 am 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 8AM. 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 2.2m 8s period and expected on Thursday (May 21) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 18th May)2.5ft (0.8m) 14s
Best Surf11AM (Mon 18th May)2.5ft (0.7m) 19s
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 4-6 Weather Summary

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

Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
1
2
1
2
0
0
0
0
0
0
0
0
1
0
0
0
0
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)
0.7
SSW
19
0.8
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
15
0.8
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
0.5
S
18
0.6
S
16
0.6
S
16
0.7
S
15
0.6
S
15
0.6
S
13
0.6
S
13
0.6
S
14
Wave Graph
Metric surfscale
Energy kJ
332
213
161
229
246
252
163
149
137
134
126
157
107
152
188
181
215
155
130
130
142
Wind (km/h)
20
ENE
25
E
20
ENE
15
ENE
30
ENE
20
ENE
30
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
25
ENE
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
Low Tide
9:45AM-0.02m
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
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:52
5:52
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
Temp °C
25
26
24
26
27
24
25
26
24
25
25
23
25
25
23
24
24
23
25
25
24
25
25
23
26
26
23
23
23
22
22
21
20
21
20
18
20
19
20
21
20
21
Swell 1
Height (m)
Direction
Period (s)
1.2
E
8
0.8
SSW
14
1.1
E
8
0.9
ENE
8
0.8
SSW
15
0.8
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
0.6
S
16
0.6
S
16
0.7
S
15
0.6
S
15
0.6
NNW
13
0.6
NNW
12
0.6
S
14
Energy kJ
190
213
161
109
246
252
163
149
57
134
126
157
107
93
188
181
215
155
106
96
142
Swell 2
Height (m)
Direction
Period (s)
0.8
SSW
14
0.5
SSE
7
0.7
SSW
14
0.8
SSW
14
0.4
SSE
7
0.6
NNW
11
0.6
NNW
10
0.5
NNW
11
0.5
S
16
0.4
SSW
14
0.4
SE
13
0.4
SE
13
0.4
SSE
12
0.5
S
18
0.5
S
13
0.4
NNW
10
0.4
NNW
10
0.4
NNW
14
0.6
S
13
0.6
S
13
0.6
NNW
11
Energy kJ
233
26
161
229
18
75
69
64
137
73
44
41
57
152
90
41
40
71
130
130
87
Swell 3
Height (m)
Direction
Period (s)
0.7
SSW
19
0.4
SE
10
0.4
SSE
7
0.6
SSW
18
0.5
NW
10
0.4
SSE
9
0.3
SSW
18
0.3
S
18
0.4
SSW
13
0.4
NW
10
0.3
NNW
10
0.4
NW
10
0.4
NNW
10
0.4
NNW
11
0.4
NNW
11
0.4
SE
12
0.4
SE
12
0.4
NW
10
0.3
S
16
0.3
S
16
0.4
SE
7
Energy kJ
332
25
18
207
54
34
63
56
67
24
19
27
39
46
44
35
35
25
46
46
13
Wind waves
Height (m)
Direction
Period (s)
1.2
ENE
8
1.1
ENE
8
1
E
8
1.2
ENE
8
1.8
E
6
1.7
E
8
1.9
E
8
2
E
8
2.2
E
8
2.1
E
8
1.9
ENE
8
2.1
ENE
8
2
ENE
8
1.7
ENE
8
1.9
ENE
8
1.7
ENE
8
1.8
ENE
8
1.7
ENE
8
1.5
E
8
Energy kJ
197
142
131
197
255
383
493
533
650
637
522
561
509
402
463
373
356
327
258
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
2
1
2
2
2
1
2
1
2
1
3
2
1
1
2
1
1
1
Distance (km)
0
1
0
0
32
0
10
17
20
15
286
20
157
170
17
157
161
20
9
157
9
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
1
2
2
2
1
2
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
4
4
4
3
3
4
3
3
3
4
2
3
1
3
2
1
2
2
2
1
2
Header Global
Rating
(10 max)
4
4
4
4
4
4
4
4
4
4
4
5
7
5
5
7
6
5
4
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 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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