Weather in Sem

14-day forecast · updated today, Thursday, October 29, at 12:28 am (CET)

Now · mainly clear 48 °F

Feels like: 45 °F
Low / high: 41 / 58 °F
Rain: 35%
Wind: 4 mph SW

→ 30.02 inHg · steady

Today in Sem: overcast, 41 °F to 58 °F, with a 35% chance of rain and a light breeze from the southwest (4 mph). Tomorrow, fog, 37 °F to 55 °F and a 0% chance of rain. The warmest day of the week is Thursday 29, at 58 °F. Next likely rain: Sunday 1 (11%).

Measured now at the airport

Torp (ENTO), 7.3 mi away · 13 min ago

Visibility6.2 mi or more

WeatherNothing to note

Temperature50 °F

Wind8 mph from the southwest

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

58° 41°
Today
55° 37°
Fri 30
49° 37°
Sat 31
50° 47°
Sun 1
48° 39°
Mon 2
55° 34°
Tue 3
47° 36°
Wed 4
46° 35°
Thu 5
42° 32°
Fri 6
38° 31°
Sat 7
40° 31°
Sun 8
41° 33°
Mon 9
39° 34°
Tue 10
40° 36°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Overcast	41 / 58 °F	35%	5 mph WSW	2.0 ft	6:19 am · 6:51 pm	ICON-EU
Fri 30	Fog	37 / 55 °F	0%	3 mph WNW	1.0 ft	7:09 am · 7:49 pm	ICON-EU
Sat 31	Fog	37 / 49 °F	1%	5 mph N	0.8 ft	8:08 am · 8:58 pm	ICON-EU
Sun 1	Light rain	47 / 50 °F	11% · 0.06 in	7 mph ENE	1.0 ft	9:19 am · 10:19 pm	ICON-EU
Mon 2	Overcast	39 / 48 °F	7%	9 mph N	0.9 ft	10:34 am · 11:35 pm	ICON-EU + ECMWF
Tue 3	Partly cloudy	34 / 55 °F	0%	5 mph NW	0.1 ft	11:43 am	ECMWF
Wed 4	Overcast	36 / 47 °F	0%	3 mph NNW	0.7 ft	12:38 am · 12:46 pm	ECMWF
Thu 5	Partly cloudy	35 / 46 °F	0%	5 mph WNW	0.5 ft	1:34 am · 1:44 pm	ECMWF
Fri 6	Overcast	32 / 42 °F	0%	6 mph NW	0.4 ft	2:25 am · 2:38 pm	ECMWF
Sat 7	Overcast	31 / 38 °F	4%	4 mph WNW	0.7 ft	3:11 am · 3:26 pm	ECMWF
Sun 8	Overcast	31 / 40 °F	7%	6 mph NNW	0.9 ft	3:51 am · 4:10 pm	ECMWF
Mon 9	Overcast	33 / 41 °F	16%	5 mph WNW	0.8 ft	4:28 am · 4:51 pm	ECMWF
Tue 10	Light drizzle	34 / 39 °F	14% · 0.03 in	9 mph NNE	1.4 ft	5:02 am · 5:30 pm	ECMWF
Wed 11	Light drizzle	36 / 40 °F	25% · 0.06 in	10 mph N	1.6 ft	5:37 am · 6:11 pm	ECMWF

Each hour comes from the best model for this spot: ICON-EU until Monday 2 8:00 pm; then ECMWF until Thursday 12 4:00 pm; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Partly cloudy	Overcast	Mainly clear	Mainly clear	Clear sky	Clear sky	Clear	Clear
Temperature	49°	45°	43°	43°	54°	57°	47°	45°
Chance of rain	35%	0%	0%	0%	0%	0%	0%	0%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	5 SW	3 WSW	3 WSW	3 SW	3 SW	3 W	3 SW	3 WSW
Humidity	94%	95%	93%	90%	74%	67%	89%	89%
UV	0	0	0	0	1	0	0	0
Model	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU

Do the models agree?

Medium confidence

They broadly agree, but not quite on temperature today: take it with some caution.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	59°	56°	53°	49°	50°	55°	47°
AIFS	55°	53°	46°	47°	47°	47°	45°
GFS	52°	53°	49°	50°	47°	44°	46°
ICON	57°	54°	50°	51°	48°	46°	48°
ARPEGE	53°	53°	46°	47°	—	—	—
ICON-EU	58°	55°	49°	50°	48°	—	—
Confidence	medium	high	high	high	high	low	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0	0	0	0	0	0	0
AIFS	0.02 in	0	0	0	0	0	0
GFS	0	0	0	0	0	0	0
ICON	0	0	0	0.05 in	0	0	0
ARPEGE	0	0	0	0.01 in	—	—	—
ICON-EU	0	0	0	0.06 in	0	—	—
Confidence	high	high	high	medium	high	high	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	920	510	410	1023	920	517	38
AIFS	8	7	2	10	10	4	3
GFS	619	46	44	923	513	33	32
ICON	916	46	610	1015	1220	24	47
ARPEGE	914	49	69	813	—	—	—
ICON-EU	510	35	59	714	917	—	—
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	35%	0%	1%	11%	7%	0%	0%
GFS (GEFS, 31 scenarios)	19%	0%	0%	10%	6%	0%	0%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit cooler and normal rain.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit below −1.8 °F	Below −94%	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.7 °F	Normal	—
Nov 16 – Nov 22Nov 16–Nov 22	Normal −0.4 °F	A bit above +21%	37° / 32°
Nov 23 – Nov 29Nov 23–Nov 29	A bit below −1.1 °F	A bit above +33%	34° / 29°
Nov 30 – Dec 6Nov 30–Dec 6	A bit below −1.4 °F	Normal	32° / 28°

Coming months

When	TemperatureTemp.	Rain
November	Normal +0.4 °F	Normal
December	Above +3.8 °F	A bit above +23%
January	Normal +0.4 °F	Normal
February	A bit below −0.9 °F	Normal
March	A bit above +0.9 °F	Normal

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Sem climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Sem is in July: highs of 71 °F, about 11 rainy days a month and 7 hours of sunshine a day.

33° 27°

JanJ
35° 26°

FebF
42° 31°

MarM
51° 38°

AprA
60° 47°

MayM
66° 54°

JunJ
71° 58°

JulJ
69° 56°

AugA
62° 49°

SepS
50° 42°

OctO
41° 35°

NovN
34° 28°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	33°	27°	2.51 in	10	1.5	39°	1.1 ft
FebruaryFeb	35°	26°	1.81 in	8	2.3	37°	1.1 ft
MarchMar	42°	31°	1.88 in	8	5.6	37°	1.0 ft
AprilApr	51°	38°	1.72 in	8	6.5	43°	0.8 ft
MayMay	60°	47°	2.25 in	9	8.7	51°	0.8 ft
JuneJun	66°	54°	2.89 in	10	8.3	59°	0.9 ft
JulyJul	71°	58°	3.26 in	11	7.5	64°	0.9 ft
AugustAug	69°	56°	3.69 in	12	6.6	65°	1.0 ft
SeptemberSep	62°	49°	3.73 in	10	4.9	60°	1.0 ft
OctoberOct	50°	42°	4.35 in	11	3.0	53°	1.0 ft
NovemberNov	41°	35°	4.36 in	12	1.2	48°	1.1 ft
DecemberDec	34°	28°	2.89 in	11	0.9	42°	1.3 ft

Month	Water	Waves
Jan	39°	1.1 ft
Feb	37°	1.1 ft
Mar	37°	1.0 ft
Apr	43°	0.8 ft
May	51°	0.8 ft
Jun	59°	0.9 ft
Jul	64°	0.9 ft
Aug	65°	1.0 ft
Sep	60°	1.0 ft
Oct	53°	1.0 ft
Nov	48°	1.1 ft
Dec	42°	1.3 ft

Days: rainy days in the month. Sun: hours a day.

A normal year brings 35.33 in of rain on about 121 days and about 1,750 hours of sunshine.

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now48 °Ffeels like 45 °F

Tomorrow37 / 55 °F

It's 48 °F now (feels like 45 °F). Today, 41 °F to 58 °F; tomorrow, 37 °F to 55 °F.

Chance of rain

Today 35%
Fri 30 0%
Sat 31 1%
Sun 1 11% 0.06 in
Mon 2 7%
Tue 3 0%
Wed 4 0%

Today the chance of rain reaches 35%. The next day with likely rain is Sunday 1: 11% and 0.06 in.

Recent rain: last 24 hours, 0.04 in; last 3 days, 0.77 in; last 7 days, 4.28 in.

Humidity and dew point

Humidity94%

Dew point46 °F

Humidity is 94% now and the dew point is 46 °F. The temperature is very close to the dew point: fog may form.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now6.9 migood

Clouds39%

Visibility is good now (6.9 mi). No fog expected today.

UV index

Now0

Today's peak1low

Fri 30: 1 · Sat 31: 0 · Sun 1: 1

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8030.0030.2030.40 30.45

Steady now (+0.01 inHg in 3 hours). Over the next 48 hours: +0.44 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 24

PollenNoneToday, at most none.

Pollen: Copernicus CAMS model (a rough guide, not a pollen trap). Levels use each type's usual thresholds.

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Heavy drizzle	46 / 55 °F	0.13 in	12 mph SW
Tue 27	Light rain	46 / 56 °F	0.71 in	17 mph SSW
Mon 26	Light drizzle	46 / 59 °F	0.03 in	13 mph SW
Sun 25	Rain	46 / 50 °F	1.84 in	24 mph SSE
Sat 24	Light rain	43 / 50 °F	0.74 in	13 mph E
Fri 23	Drizzle	44 / 53 °F	0.14 in	7 mph SSE
Thu 22	Rain	46 / 53 °F	0.91 in	13 mph SE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Rain	42 / 52 °F	1.20 in	13 mph NE
Tue 20	Light drizzle	37 / 47 °F	0.01 in	12 mph NNE
Mon 19	Overcast	33 / 52 °F	0	8 mph SW
Sun 18	Overcast	34 / 51 °F	0	5 mph N
Sat 17	Partly cloudy	34 / 51 °F	0	11 mph N
Fri 16	Heavy drizzle	40 / 56 °F	0.19 in	11 mph WSW
Thu 15	Light drizzle	50 / 58 °F	0.11 in	17 mph SSW
Wed 14	Drizzle	44 / 59 °F	0.06 in	11 mph W
Tue 13	Rain	40 / 51 °F	0.80 in	15 mph SSE
Mon 12	Overcast	34 / 48 °F	0	8 mph N
Sun 11	Drizzle	38 / 42 °F	0.20 in	15 mph N
Sat 10	Light snow	38 / 45 °F	0.77 in	15 mph NNE
Fri 9	Overcast	40 / 51 °F	0	15 mph N
Thu 8	Rain	42 / 47 °F	1.11 in	17 mph N
Wed 7	Light rain	36 / 56 °F	0.19 in	8 mph SSW
Tue 6	Mainly clear	47 / 61 °F	0	13 mph WSW
Mon 5	Drizzle	54 / 64 °F	0.17 in	15 mph SW
Sun 4	Heavy drizzle	41 / 59 °F	0.12 in	13 mph SW
Sat 3	Drizzle	49 / 59 °F	0.15 in	15 mph SW
Fri 2	Light rain	52 / 62 °F	0.37 in	9 mph S
Thu 1	Light drizzle	51 / 66 °F	0.01 in	9 mph ENE
Wed 30	Light drizzle	53 / 61 °F	0.06 in	10 mph NE
Tue 29	Overcast	45 / 60 °F	0	8 mph NNE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in SemQuestions

What's the weather like today in Sem?

Overcast, from 41 °F to 58 °F, with a light breeze from the southwest (4 mph) and a 35% chance of rain.

Will it rain tomorrow in Sem?

On Friday 30 the chance of rain is 0% (0.00 in): fog.

How warm will it be this week?

Between a low of 34 °F and a high of 58 °F; the warmest day, Thursday 29.

What's the UV index today?

It reaches 1 (low). No special protection needed.

Is the pressure rising or falling?

It's 30.02 inHg and steady: +0.24 inHg over the last 24 hours.

When is the best time to visit Sem?

The best time to visit Sem is in July: highs of 71 °F, about 11 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Sem in October?

In October, Sem normally sees highs of 50 °F and lows of 42 °F, with about 11 rainy days (4.35 in for the month) and 3 hours of sunshine a day. The sea is around 53 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Sem?

The warmest is July, with average highs of 71 °F, and the coldest February, with lows of 26 °F. The wettest is November (4.36 in) and the driest, April.

More about Sem today

Weather near Sem

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 3.6 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 12:28 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from