Plum Island 48 hour detailed Surf Forecast

Lat Long: 42.80° N 70.81° W

Issued: 1 am 29 Sep 2026 (local time)

Forecast update in hr min

Today's Plum Island sea temperature is

15.5°C

Plum Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Surf Forecasts:

How big are the waves at Plum Island today (29 Sep):

Morning surf: Morning surf (29 Sep, local time) - 4.5ft (1.4m), 8s period with ENE swell.
Afternoon surf: Afternoon surf (29 Sep, local time) - 3.5ft (1.0m), 9s period with E swell.
Evening surf: Evening surf (29 Sep, local time) - 3ft (0.9m), 9s period with E swell.

The current surf forecast for Plum Island at 10AM is: 1.0m 8s primary swell from a East direction and 0.4m 7s secondary swell from a Southeast direction, 0.6m 5s secondary swell from a North-northeast direction (forecast issued at 01:00am September 29). The wind direction is predicted to be cross-offshore.

Time (EDT) & Date	Wave Height	Wave Period
Morning (29 Sep)	4.5ft (1.4m)	8s
Afternoon (29 Sep)	3.5ft (1.0m)	9s
Evening (29 Sep)	3ft (0.9m)	9s

Table - waves today at Plum Island. (Swell directed towards the surf break)

	Short Range Forecast Mostly dry. Warm (max 26°C on Thu afternoon, min 13°C on Tue morning). Wind will be generally light.
	Tuesday 29								Wednesday 30								Thursday 1
	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	5 PM	8 PM	11 PM
Rating (10 max)	1	1	2	1	1	0	0	1	1	1	1	1	0	0	1	1	1	1	1	1	1	0	1	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	E 8	E 8	ENE 8	E 8	E 9	E 9	E 9	E 9	E 9	E 9	E 9	E 9	E 9	E 8	E 8	E 8	E 8	E 8	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12
Wave Graph
kJ	260	224	256	142	146	146	119	117	122	125	122	122	94	92	91	69	68	68	50	49	49	35	36	36
Wind (km/h)	NNW	NNW	NW	NNW	NNW	ENE	ENE	N	NNW	W	SW	S	SSE	SSE	SSW	SW	SW	W	SW	SW	SW	WSW	SW	SW
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	cross-off	cross-off	cross-off	on	cross-on	glassy	glassy	glassy	cross-off	glassy	cross	cross	cross-off	cross-off	cross-off	off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off
High Tide	1:42AM2.59m				1:58PM2.84m					2:28AM2.54m				2:44PM2.84m				3:18AM2.46m				3:34PM2.80m
Low Tide				8:10AM0.02m				8:45PM-0.20m				8:53AM0.08m				9:34PM-0.15m				9:41AM0.17m				10:31PM-0.07m


	—	6:37	—	—	—	—	—	—	—	6:37	—	—	—	—	—	—	—	6:39	—	—	—	—	—	—
	—	—	—	—	—	6:28	—	—	—	—	—	—	—	6:27	—	—	—	—	—	—	—	6:24	—	—
mm	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	12	12	13	15	17	17	15	15	15	15	14	17	19	19	17	18	19	18	19	22	26	24	23	21
Feels °C	9	9	11	13	17	17	15	15	16	15	14	17	18	17	16	18	19	18	19	22	25	22	22	21
Swell 1 Height (m) Direction Period (s)	E 8	E 8	ENE 8	E 8	E 9	E 9	E 9	E 9	E 9	E 9	E 9	E 9	E 9	E 8	E 8	E 8	E 8	E 8	E 8	E 8	E 8	E 8	E 8	E 8
kJ	260	224	256	142	146	146	119	117	122	125	122	122	94	92	91	69	68	68	50	49	49	34	33	31
Swell 2 Height (m) Direction Period (s)	SE 14	ESE 14	SE 7	SE 7	NNE 4	NE 4	NE 4	NE 4	NE 4	NE 4	NE 4	ESE 13	ESE 13	ESE 13	SE 13	ESE 12	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12
kJ	8	20	14	14	12	9	4	4	3	3	3	17	17	16	42	30	38	37	37	36	36	35	36	36
Swell 3 Height (m) Direction Period (s)	SE 14	SE 8	ESE 14	ESE 14	ESE 14	ESE 14	SSE 6	SSE 6	ESE 13	ESE 13	ESE 13	NE 4	SE 7	ENE 4	SSE 7	SE 7	SE 7	SE 7	SE 9	NE 4	SE 9	SE 9	SE 12	ESE 12
kJ	8	10	20	20	20	19	4	4	17	17	17	3	9	2	5	2	2	2	3	1	13	12	6	14
Wind waves Height (m) Direction Period (s)	NNE 6	NNE 5	NNW 4	NNE 5	N 4	NNE 4	—	—	NNE 4	—	—	—	—	—	SSE 3	S 3	S 3	S 3	SSW 3	SSW 3	SSW 2	S 3	SSW 3	S 4
kJ	111	35	13	17	15	11	—	—	6	—	—	—	—	—	2	3	3	2	2	1	1	1	4	16
Nearest Offshore or Glassy	Deveraux Beach Massachusetts	Seabrook Beach New Hampshire	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Good Harbor Beach Massachusetts	Good Harbor Beach Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Winthrop Jetty Massachusetts	Turtle Cove Long Island NY	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts	Salisbury Beach Massachusetts	Plum Island Massachusetts	Plum Island Massachusetts
Rating (10 max)	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Distance (km)	27	9	0	0	0	25	25	0	0	0	0	0	52	211	0	0	0	0	0	0	0	4	0	0
Best forecast wave conditions in Massachusetts	Lecount Hollow	Nantasket Beach	Fieldstone	Nahant Beach	Green Harbor	Green Harbor	Lecount Hollow	Lecount Hollow	Nantasket Beach	Marshfield Jetty	Marshfield Jetty	Marshfield Jetty	Lecount Hollow		Lecount Hollow	Ballston Beach	Ballston Beach	Ballston Beach	Ballston Beach	Ballston Beach	Ballston Beach	Salisbury Beach	Fieldstone	Fieldstone
Rating (10 max)	2	2	2	2	1	1	1	1	1	1	1	1	1		1	1	1	1	1	1	1	1	1	1
Best forecast wave conditions in United States	The Wedge CAL - Orange County	The Wedge CAL - Orange County	The Wedge CAL - Orange County	The Wedge CAL - Orange County	Lincoln City Nelscott Reef Oregon North	North End Virginia	Chincoteague Virginia	Lincoln City Nelscott Reef Oregon North	Lincoln City Nelscott Reef Oregon North	Lincoln City Nelscott Reef Oregon North	Chincoteague Virginia	Tijuana Sloughs Baja Norte	Georgica Pond Long Island NY	The Dump Washington	The Dump Washington	Lincoln City Nelscott Reef Oregon North	Trestles (Uppers) CAL - Orange County	Lincoln City Nelscott Reef Oregon North	Lincoln City Nelscott Reef Oregon North	Lincoln City Nelscott Reef Oregon North	Lincoln City Nelscott Reef Oregon North	Fort Canby A Jetty Washington	Seaside Point Oregon North	Lincoln City Nelscott Reef Oregon North
Rating (10 max)	2	2	2	2	4	1	1	4	4	4	1	2	1	2	2	3	2	3	3	3	3	2	2	2
Header Global	Humenga Point New Zealand	White Rock - The Spit New Zealand	Dunedin - Bobs Beach New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Fullers United States	Dinner Plates New Zealand	Papatowai New Zealand	Papatowai New Zealand	Otago Peninsula - Allans Beach New Zealand	Ouano Lefts New Caledonia	Gerickes Point South Africa	Cavalos de Fao Portugal	Easky Left Ireland	Easky Left Ireland	Easky Left Ireland	Gas Bay Australia	Cobblestones Australia	Cobblestones Australia	Anael France	Figueira da Foz - Buarcos Portugal	Figueira da Foz - Buarcos Portugal
Rating (10 max)	5	6	9	8	7	7	6	5	5	5	5	4	5	5	5	9	9	8	7	6	6	5	5	5

Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

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Plum Island 48 hour detailed Surf Forecast

How big are the waves at Plum Island today (29 Sep):

Short Range Forecast

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