Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 7 pm Sunday 10 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
25.5° C
(Which is slightly warmer than usual)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 12AM is: 0.3m 6s primary swell from a Southeast direction (forecast issued at 07:00pm May 10). An open ocean swell of 0.4m 11s is not directed at the surf break, a second open ocean swell of 0.3m 6s is not directed at the surf break, a second open ocean swell of 1.2m 6s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (HST) & DateWave HeightWave Period
Morning (11 May)1ft (0.3m)18s
Afternoon (11 May)1ft (0.3m)18s
Evening (11 May)1.5ft (0.4m)17s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 27°C on Wed afternoon, min 22°C on Mon night). Wind will be generally light.

Sun
10
Monday
11
Tuesday
12
Wed
13
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
11 AM
2 PM
Rating
(10 max)
0
0
0
0
1
1
0
0
0
1
1
1
1
1
1
1
1
0
1
1
0
1
1
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)
0.2
SSW
13
0.2
S
13
0.3
SE
6
0.3
SSW
13
0.2
SSW
19
0.3
SSW
19
0.5
NW
12
0.3
SSW
18
0.4
SSW
17
0.4
SSW
17
0.3
SSW
17
0.3
SSW
17
0.4
SSW
16
0.4
SSW
16
0.4
SSW
16
0.5
S
16
0.4
SSW
16
0.3
S
16
0.3
S
15
0.3
SSW
15
0.3
SSW
14
0.4
S
14
0.4
S
14
0.3
SW
15
Wave Graph
Metric surfscale
Energy kJ
17
14
5
32
35
68
67
60
101
101
58
54
86
84
84
129
82
42
39
42
41
66
65
34
Wind (km/h)
15
NNE
20
NNE
15
NNE
15
NE
20
NE
20
NE
20
NNE
20
N
20
NNE
20
NNE
20
NE
15
NNE
15
NE
15
NE
10
NNE
15
NE
15
NE
15
NNE
15
NNE
10
NNE
10
NE
10
NNE
0
WSW
5
ENE
off
off
off
off
off
off
cross-off
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
cross-off
off
off
glassy
cross-off
High Tide
11:26PM0.53m
12:43PM0.45m
00:14AM0.49m
1:25PM0.55m
1:00AM0.44m
Low Tide
4:46PM0.16m
5:58AM0.00m
6:02PM0.15m
6:29AM-0.03m
7:12PM0.13m
7:01AM-0.06m
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:53
6:54
6:54
Temp °C
26
24
23
23
23
24
26
26
26
23
23
22
22
24
26
26
26
23
23
23
23
24
26
27
26
24
22
23
22
23
24
24
25
21
22
21
21
23
26
26
25
22
23
24
24
24
28
28
Swell 1
Height (m)
Direction
Period (s)
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.5
NNW
12
0.5
NNW
12
0.5
NNW
12
0.5
NW
12
0.5
NNW
11
0.4
NW
11
0.4
NNW
11
0.4
NW
11
0.4
NW
11
0.4
SSW
16
0.4
SSW
16
0.4
SSW
16
0.5
S
16
0.4
SSW
16
0.5
N
10
0.5
SE
7
0.4
NW
10
0.4
NNW
10
0.4
S
14
0.4
NNW
10
0.3
SE
6
Energy kJ
42
42
43
81
81
79
67
69
30
46
29
29
86
84
84
129
82
52
23
25
32
66
31
6
Swell 2
Height (m)
Direction
Period (s)
0.4
N
6
0.3
N
6
0.3
N
6
0.3
SSW
13
0.3
SSW
12
0.3
SSW
19
0.3
SSW
18
0.3
SSW
18
0.4
SSW
17
0.4
SSW
17
0.3
SSW
17
0.3
SSW
17
0.4
NW
11
0.4
SE
6
0.3
N
7
0.3
NNE
6
0.4
NW
10
0.4
SE
7
0.4
NNW
10
0.3
SSW
15
0.4
SE
6
0.4
NNW
10
0.4
S
14
0.3
SW
15
Energy kJ
10
6
6
32
29
68
61
60
101
101
58
54
29
10
8
8
27
12
33
42
9
31
65
34
Swell 3
Height (m)
Direction
Period (s)
0.2
SSW
13
0.2
S
13
0.3
SE
6
0.3
SE
6
0.2
SSW
19
0.2
ESE
6
0.2
ESE
6
0.3
SE
6
0.3
SE
6
0.3
SE
6
0.4
SE
6
0.4
SE
6
0.4
SE
6
0.4
NW
11
0.3
SE
6
0.3
NNW
11
0.3
NNE
6
0.3
S
16
0.3
S
15
0.3
S
15
0.3
SSW
14
0.3
SE
7
0.3
SE
6
0.2
NNW
9
Energy kJ
17
14
5
5
35
4
3
5
5
6
10
10
10
29
6
23
8
42
39
38
41
7
7
8
Wind waves
Height (m)
Direction
Period (s)
1
E
5
1.2
E
6
1.2
E
6
1.2
E
5
0.3
NNE
6
1.5
E
6
0.5
N
3
0.4
NNE
3
0.4
NE
3
0.3
ENE
3
0.2
ENE
3
1.4
E
6
1.2
E
6
1.6
E
6
1.7
E
6
1.6
E
6
0.4
ESE
7
1.5
E
6
1.2
E
6
1.5
E
7
1.7
E
6
Energy kJ
52
91
88
73
6
133
4
4
3
1
1
125
92
169
211
209
17
165
96
192
204
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
Distance (km)
12
12
12
12
12
12
12
12
12
12
12
12
12
12
4
4
12
12
12
4
12
4
12
12
Best forecast wave conditions in Maui
Rating
(10 max)
1
1
2
2
2
2
2
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
3
3
3
3
2
2
1
3
3
3
3
3
2
1
2
3
3
3
3
3
2
1
3
Header Global
Rating
(10 max)
8
6
5
4
5
5
5
9
9
6
9
9
9
9
9
8
9
9
9
7
6
5
9
8
  • 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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