Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 1 pm Saturday 16 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grandma's sea temperature is
25.2° C
(Which is normal for this time of year)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 5PM is: 0.4m 14s primary swell from a Southwest direction and 0.3m 16s secondary swell from a South-southwest direction, 0.4m 3s secondary swell from a Southwest direction (forecast issued at 01:00pm May 16). The wind direction is predicted to be cross-onshore.

Time (HST) & DateWave HeightWave Period
Morning (16 May)1.5ft (0.5m)15s
Afternoon (16 May)1.5ft (0.4m)14s
Evening (16 May)1.5ft (0.4m)14s

Table - waves today at Grandma's. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 6mm), mostly falling on Mon afternoon. Warm (max 27°C on Sun afternoon, min 23°C on Mon night). Wind will be generally light.

Sat
16
Sunday
17
Monday
18
Tue
19
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)
1
0
0
1
1
1
1
1
1
1
2
2
1
1
1
1
2
2
1
1
1
1
1
1
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)
0.4
SW
15
0.4
SW
14
0.4
SW
14
0.4
SW
14
0.4
SW
14
0.4
SW
13
0.4
SSW
16
0.4
SSW
16
0.5
SSW
15
0.5
SSW
15
0.6
SSW
15
0.6
SSW
15
0.6
SSW
15
0.6
SSW
14
0.5
SSW
14
0.6
SSW
14
0.7
SSW
14
0.7
SSW
14
0.4
SW
19
0.5
SSW
14
0.5
SSW
14
0.5
SSW
14
0.7
SSW
14
0.4
SSW
18
Wave Graph
Metric surfscale
Energy kJ
54
54
53
54
56
57
89
95
133
133
146
146
142
140
118
136
183
186
108
105
104
105
173
121
Wind (km/h)
5
SW
10
SSW
10
W
10
NNW
5
NNE
0
WNW
5
NNE
5
N
0
W
5
NE
5
ENE
10
NNE
10
N
5
NNW
10
NNE
10
N
5
WNW
10
N
10
N
10
NNE
10
NNE
10
NNE
10
N
10
NNE
glassy
cross-on
cross-on
cross-off
cross-off
glassy
cross-off
cross-off
glassy
glassy
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
cross-off
off
off
off
cross-off
off
High Tide
4:17PM0.83m
4:09AM0.25m
5:04PM0.84m
5:03AM0.22m
5:54PM0.84m
6:05AM0.21m
Low Tide
8:49AM-0.11m
11:12PM0.04m
9:30AM-0.10m
00:10AM0.04m
10:15AM-0.09m
1:09AM0.04m
part cloud
part cloud
part cloud
thunderstorm
clear
clear
clear
clear
clear
part cloud
rain showers
clear
clear
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
5:47
5:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:55
6:57
6:57
6:58
1
1
1
2
1
Temp °C
26
25
25
26
25
24
24
25
26
27
26
25
25
24
24
25
26
26
26
25
24
24
23
24
29
27
28
28
28
28
27
28
30
30
29
28
28
27
27
27
29
29
28
27
26
26
24
25
Swell 1
Height (m)
Direction
Period (s)
0.4
SW
15
0.4
SW
14
0.4
SW
14
0.4
SW
14
0.6
S
7
0.5
S
6
0.4
S
6
0.4
SSW
16
0.5
SSW
15
0.5
SSW
15
0.6
SSW
15
0.6
SSW
15
0.6
SSW
15
0.6
SSW
14
0.5
SSW
14
0.6
SSW
14
0.7
SSW
14
0.7
SSW
14
0.5
SSW
14
0.5
SSW
14
0.5
SSW
14
0.5
SSW
14
0.7
SSW
14
0.5
SSW
14
Energy kJ
54
54
53
53
33
19
10
95
133
133
146
146
142
140
118
136
183
186
108
105
104
105
173
113
Swell 2
Height (m)
Direction
Period (s)
0.4
NW
11
0.3
NNW
11
0.3
SSW
16
0.4
SSE
9
0.4
SW
14
0.3
SSW
17
0.4
SW
14
0.4
S
6
0.4
SW
14
0.3
NNW
10
0.4
SW
21
0.4
SW
21
0.4
SW
21
0.3
ESE
6
0.4
SE
6
0.3
SSE
6
0.4
SW
19
0.5
SW
19
0.4
SW
19
0.3
SSW
16
0.4
SE
6
0.3
SSW
16
0.3
SW
18
0.4
SSW
18
Energy kJ
31
24
52
26
53
57
52
9
54
20
117
117
117
6
10
7
96
184
96
51
9
52
49
121
Swell 3
Height (m)
Direction
Period (s)
0.3
SSE
12
0.3
SSW
16
0.3
NW
11
0.3
SSW
17
0.3
SSW
17
0.4
SW
13
0.4
SSW
16
0.4
SW
15
0.4
S
6
0.3
S
6
0.3
SSE
6
0.3
SSE
6
0.3
S
6
0.3
S
6
0.2
NNE
6
0.2
SSW
20
0.3
SSE
5
0.3
SSE
6
0.3
SSW
16
0.3
SSW
19
0.3
SSW
16
0.3
SE
6
0.2
ESE
6
0.3
E
5
Energy kJ
27
53
19
54
56
42
89
54
12
7
8
8
7
7
4
37
6
7
51
74
51
6
3
5
Wind waves
Height (m)
Direction
Period (s)
0.2
S
5
0.4
SW
3
0.3
W
2
0.6
E
5
1.1
E
8
1.2
E
8
1.3
E
8
0.9
E
5
1.6
E
6
1.3
E
6
1.3
E
8
1.2
E
8
1.3
E
8
1.4
E
8
1.3
E
8
1.5
E
6
1.2
E
6
1.5
E
6
1.6
E
6
Energy kJ
2
2
1
17
165
196
235
42
164
124
230
196
223
258
219
149
89
134
158
Nearest Offshore or Glassy
Rating
(10 max)
1
3
1
1
1
1
1
1
1
1
2
2
2
2
1
1
2
2
1
1
2
1
2
2
Distance (km)
4
17
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Best forecast wave conditions in Maui
Rating
(10 max)
1
3
2
1
1
2
1
1
1
1
2
2
2
2
1
1
2
2
1
1
2
1
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
4
3
2
2
2
9
2
1
1
5
7
4
4
5
4
4
4
4
4
4
4
4
3
Header Global
Rating
(10 max)
5
5
4
4
6
9
9
7
4
4
5
7
5
4
5
4
4
4
4
5
5
4
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)
Map placeholder

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