Grandma's surf break

Grandma's surfForecast / HAW – Maui / USA

information circle48hr Weather and Surf, issued 7 pm Monday 11 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
25.4° C
(Which is slightly warmer than usual)

How big are the waves at Grandma's today?

The current surf forecast for Grandma's at 1AM is: 0.3m 17s primary swell from a South-southwest direction (forecast issued at 07:00pm May 11). An open ocean swell of 0.4m 11s is not directed at the surf break, a second open ocean swell of 1.5m 6s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (HST) & DateWave HeightWave Period
Morning (12 May)1.5ft (0.4m)16s
Afternoon (12 May)1.5ft (0.4m)16s
Evening (12 May)1ft (0.3m)15s

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 26°C on Tue morning, min 22°C on Mon night). Wind will be generally light.

Mon
11
Tuesday
12
Wednesday
13
Thu
14
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)
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
0
0
0
0
0
0
0
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
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
0.3
SSW
14
0.3
S
13
0.2
SSW
15
0.3
SW
15
0.3
S
13
0.3
S
13
0.5
NW
15
0.5
NW
15
Wave Graph
Metric surfscale
Energy kJ
101
101
58
54
86
84
84
129
82
42
38
42
41
66
65
34
37
31
21
33
30
30
116
109
Wind (km/h)
20
NE
20
NNE
20
NE
15
NNE
15
NE
15
NE
5
NNE
5
NE
10
ENE
15
NE
15
NNE
15
NNE
10
NNE
10
NNE
5
SW
5
E
10
NE
15
NE
15
NNE
10
NE
15
NNE
10
NNE
0
NW
10
ESE
off
off
off
off
off
off
cross-off
off
off
off
off
off
off
off
glassy
glassy
off
off
off
off
off
off
glassy
cross-off
High Tide
00:14AM0.49m
1:25PM0.55m
1:00AM0.44m
2:07PM0.64m
1:46AM0.39m
Low Tide
6:02PM0.15m
6:29AM-0.03m
7:12PM0.13m
7:01AM-0.06m
8:16PM0.10m
7:34AM-0.09m
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:54
6:54
6:55
Temp °C
26
24
23
22
22
24
26
26
26
24
23
23
23
24
26
26
26
24
24
23
23
24
26
26
25
22
22
21
21
23
27
27
26
24
23
24
24
25
28
28
27
24
24
24
24
25
28
27
Swell 1
Height (m)
Direction
Period (s)
0.5
NNW
11
0.4
NW
11
0.5
N
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
0.4
ESE
7
0.4
ESE
7
0.4
ESE
6
0.4
S
14
0.4
S
14
0.4
NE
6
0.4
SE
7
0.4
SE
7
0.4
SE
7
0.3
N
9
0.4
SE
5
0.4
NW
16
0.5
NW
15
0.5
NW
15
Energy kJ
68
30
58
29
86
84
84
129
82
52
19
18
16
66
65
8
13
13
11
13
7
68
116
109
Swell 2
Height (m)
Direction
Period (s)
0.4
SSW
17
0.4
SSW
17
0.3
SSW
17
0.3
SSW
17
0.3
N
7
0.3
N
7
0.3
N
7
0.3
NNE
6
0.4
NNW
10
0.4
SE
7
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.3
NNW
10
0.2
NNW
9
0.3
SSW
14
0.4
NNE
9
0.3
N
9
0.3
SW
15
0.3
NNE
8
0.3
S
13
0.3
S
13
0.3
N
8
Energy kJ
101
101
58
54
8
8
8
8
42
12
33
33
32
31
18
8
37
28
14
33
14
30
29
12
Swell 3
Height (m)
Direction
Period (s)
0.3
SE
6
0.3
NNE
6
0.4
SE
6
0.4
SE
6
0.4
NW
11
0.3
NW
11
0.3
NW
10
0.3
NNW
11
0.4
SE
7
0.3
S
16
0.3
S
15
0.3
SSW
15
0.3
SSW
14
0.4
SE
7
0.3
SE
6
0.3
SW
15
0.2
NNW
9
0.3
S
13
0.2
SSW
15
0.2
NNW
17
0.3
S
13
0.3
NNE
8
0.3
N
8
0.3
S
12
Energy kJ
6
8
10
10
29
18
16
23
11
42
38
42
41
11
6
34
8
31
21
29
30
14
12
25
Wind waves
Height (m)
Direction
Period (s)
1.4
E
5
1.4
E
6
1.5
E
6
1.5
E
6
1.3
E
6
1.2
E
6
1.3
E
6
1.7
E
6
1.8
E
6
1.6
E
6
1.9
E
7
1.7
E
6
1.6
E
6
1.4
E
6
1.6
E
6
1.7
E
6
0.3
NNE
6
0.4
ENE
3
0.5
ESE
6
1.4
E
8
1.5
E
8
1.4
E
8
1.4
E
8
Energy kJ
108
125
144
160
112
92
114
197
244
209
312
221
194
148
187
225
7
2
22
223
268
240
240
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
12
12
12
12
12
12
4
4
12
12
12
12
12
12
13
12
12
12
12
12
12
12
12
13
Best forecast wave conditions in Maui
Rating
(10 max)
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
3
3
2
2
2
3
3
2
2
3
2
1
1
1
4
4
4
4
3
3
2
Header Global
Rating
(10 max)
9
5
9
8
8
9
9
9
9
9
7
6
7
6
8
9
9
5
5
5
5
5
5
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

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Grandma's surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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