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Now · 12:58 PM

Semaphore Weather & Hourly Forecast

Australia · South Australia · 5019

Mostly cloudy
15°C
Mostly cloudy
Feels like: 13°C
💧 Humidity 75% 🌡 Pressure 1024 hPa 💨 Wind 10 km/h 👁 Visibility 38.8 km Clouds 74% ☀️ UV index 4.1 · Moderate 🌅 Sunrise 🌇 Sunset

Hourly Forecast for Semaphore

Today
Mostly cloudy · 1:30 PM Mostly cloudy
15° 💧 0.0 mm 💨 10 km/h H 74%1024 hPa
Mostly cloudy · 4:30 PM Mostly cloudy
15° 💧 None 💨 9 km/h H 72%1024 hPa
Mostly clear night · 7:30 PM Mostly clear night
14° 💧 None 💨 13 km/h H 80%1026 hPa
Mostly clear night · 10:30 PM Mostly clear night
13° 💧 0.0 mm 💨 12 km/h H 84%1027 hPa
Tomorrow
Mostly clear night · 1:30 AM Mostly clear night
13° 💧 0.0 mm 💨 13 km/h H 86%1028 hPa
Clear night · 4:30 AM Clear night
12° 💧 None 💨 8 km/h H 85%1027 hPa
Sunny · 7:30 AM Sunny
12° 💧 None 💨 7 km/h H 84%1030 hPa
Mostly cloudy · 10:30 AM Mostly cloudy
15° 💧 None 💨 6 km/h H 67%1031 hPa
Mostly cloudy · 1:30 PM Mostly cloudy
16° 💧 None 💨 16 km/h H 64%1029 hPa
Sunny · 4:30 PM Sunny
15° 💧 None 💨 16 km/h H 57%1029 hPa
Mostly cloudy night · 7:30 PM Mostly cloudy night
12° 💧 None 💨 10 km/h H 72%1030 hPa
Mostly clear night · 10:30 PM Mostly clear night
11° 💧 None 💨 3 km/h H 80%1030 hPa
Tuesday
Mostly clear night · 1:30 AM Mostly clear night
💧 None 💨 6 km/h H 91%1029 hPa
Clear night · 4:30 AM Clear night
💧 None 💨 8 km/h H 89%1028 hPa
Mostly cloudy · 7:30 AM Mostly cloudy
💧 None 💨 8 km/h H 91%1029 hPa
Mostly sunny · 10:30 AM Mostly sunny
13° 💧 None 💨 3 km/h H 67%1029 hPa

In Semaphore and, more broadly, across South Australia: The rest of the day will see a mix of sun and clouds, with cool conditions throughout. Temperatures are expected to range from a low of 11 degrees Celsius to a high of 16 degrees Celsius. Winds will be light, coming from the southwest at a maximum of 11 km/h, with gusts also reaching up to 11 km/h. No precipitation is anticipated, so the weather should remain dry. It’s a mild afternoon, but it may feel slightly cooler with the breeze. Overall, it looks like a calm and mostly clear day ahead.

15-Day Weather Outlook for Semaphore

Sunday, Sep 6Sun Sep 6 Mostly cloudy Mostly cloudy 15°/11° 💧 None 💨 15 km/h
TomorrowTomorrow Mostly cloudy Mostly cloudy 16°/ 💧 None 💨 17 km/h
Tuesday, Sep 8Tue Sep 8 Mostly sunny Mostly sunny 14°/11° 💧 0.9 mm 💨 20 km/h
Wednesday, Sep 9Wed Sep 9 Partly cloudy Partly cloudy 15°/ 💧 None 💨 25 km/h
Thursday, Sep 10Thu Sep 10 Sunny Sunny 17°/ 💧 None 💨 9 km/h
Friday, Sep 11Fri Sep 11 Partly cloudy Partly cloudy 18°/11° 💧 None 💨 11 km/h
Saturday, Sep 12Sat Sep 12 Mostly sunny Mostly sunny 22°/17° 💧 None 💨 19 km/h
Sunday, Sep 13Sun Sep 13 Partly cloudy Partly cloudy 19°/14° 💧 0.1 mm 💨 25 km/h
Monday, Sep 14Mon Sep 14 Light rain Light rain 16°/12° 💧 1.1 mm 💨 29 km/h
Tuesday, Sep 15Tue Sep 15 Overcast Overcast 15°/ 💧 None 💨 21 km/h
Wednesday, Sep 16Wed Sep 16 Sunny Sunny 15°/11° 💧 None 💨 16 km/h
Thursday, Sep 17Thu Sep 17 Mostly sunny Mostly sunny 22°/17° 💧 None 💨 31 km/h
Friday, Sep 18Fri Sep 18 Light rain Light rain 19°/14° 💧 0.9 mm 💨 33 km/h
Saturday, Sep 19Sat Sep 19 Partly cloudy Partly cloudy 16°/12° 💧 None 💨 13 km/h
Sunday, Sep 20Sun Sep 20 Overcast Overcast 21°/17° 💧 None 💨 19 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Semaphore

Vertical axis: °C · Color based on temperature
Mostly cloudy at 1:30 PM
59° Today 1:30 PM
Mostly sunny at 2:30 PM
59° 2:30 PM
Mostly sunny at 3:30 PM
59° 3:30 PM
Mostly cloudy at 4:30 PM
59° 4:30 PM
Partly cloudy at 5:30 PM
58° Today 5:30 PM
Partly cloudy night at 6:30 PM
58° 6:30 PM
Mostly clear night at 7:30 PM
57° 7:30 PM
Partly cloudy night at 8:30 PM
57° 8:30 PM
Mostly cloudy night at 9:30 PM
57° Today 9:30 PM
Mostly clear night at 10:30 PM
56° 10:30 PM
Mostly clear night at 11:30 PM
56° 11:30 PM
Partly cloudy night at 12:30 AM
56° 12:30 AM
Mostly clear night at 1:30 AM
55° Tomorrow 1:30 AM
Overcast night at 2:30 AM
55° 2:30 AM
Mostly clear night at 3:30 AM
55° 3:30 AM
Clear night at 4:30 AM
54° 4:30 AM
Clear night at 5:30 AM
53° Tomorrow 5:30 AM
Sunny at 6:30 AM
52° 6:30 AM
Sunny at 7:30 AM
53° 7:30 AM
Sunny at 8:30 AM
56° 8:30 AM
Sunny at 9:30 AM
57° Tomorrow 9:30 AM
Mostly cloudy at 10:30 AM
58° 10:30 AM
Mostly cloudy at 11:30 AM
58° 11:30 AM
Mostly cloudy at 12:30 PM
58° 12:30 PM
Mostly cloudy at 1:30 PM
61° Tomorrow 1:30 PM
Mostly sunny at 2:30 PM
61° 2:30 PM
Sunny at 3:30 PM
61° 3:30 PM
Sunny at 4:30 PM
60° 4:30 PM
Sunny at 5:30 PM
58° Tomorrow 5:30 PM
Mostly cloudy night at 6:30 PM
55° 6:30 PM
Mostly cloudy night at 7:30 PM
54° 7:30 PM
Partly cloudy night at 8:30 PM
53° 8:30 PM
Clear night at 9:30 PM
52° Tomorrow 9:30 PM
Mostly clear night at 10:30 PM
52° 10:30 PM
Mostly clear night at 11:30 PM
51° 11:30 PM
Partly cloudy night at 12:30 AM
50° 12:30 AM
Mostly clear night at 1:30 AM
49° Tuesday 1:30 AM
Clear night at 2:30 AM
48° 2:30 AM
Clear night at 3:30 AM
48° 3:30 AM
Clear night at 4:30 AM
47° 4:30 AM
Overcast night at 5:30 AM
46° Tuesday 5:30 AM
Partly cloudy at 6:30 AM
46° 6:30 AM
Mostly cloudy at 7:30 AM
47° 7:30 AM
Mostly sunny at 8:30 AM
50° 8:30 AM
Sunny at 9:30 AM
53° Tuesday 9:30 AM
Mostly sunny at 10:30 AM
56° 10:30 AM
Mostly cloudy at 11:30 AM
57° 11:30 AM
Mostly cloudy at 12:30 PM
57° 12:30 PM
Mostly cloudy at 1:30 PM
58° Tuesday 1:30 PM
Mostly cloudy at 2:30 PM
58° 2:30 PM
Mostly cloudy at 3:30 PM
57° 3:30 PM
Overcast at 4:30 PM
57° 4:30 PM
Overcast at 5:30 PM
57° Tuesday 5:30 PM
Overcast night at 6:30 PM
56° 6:30 PM
Overcast night at 7:30 PM
55° 7:30 PM
Overcast night at 8:30 PM
55° 8:30 PM
Overcast night at 9:30 PM
55° Tuesday 9:30 PM
Partly cloudy at 6:30 AM
52° 6:30 AM
Mostly cloudy at 9:30 AM
54° 9:30 AM
Overcast at 12:30 PM
56° 12:30 PM
Partly cloudy at 3:30 PM
57° Wednesday 3:30 PM
Mostly clear night at 6:30 PM
54° 6:30 PM
Mostly clear night at 9:30 PM
52° 9:30 PM
Clear night at 12:30 AM
50° 12:30 AM
Clear night at 3:30 AM
48° Thursday 3:30 AM
Sunny at 6:30 AM
46° 6:30 AM
Sunny at 9:30 AM
53° 9:30 AM
Sunny at 12:30 PM
60° 12:30 PM
Sunny at 3:30 PM
63° Thursday 3:30 PM
Clear night at 6:30 PM
56° 6:30 PM
Clear night at 9:30 PM
53° 9:30 PM
Clear night at 12:30 AM
50° 12:30 AM
Clear night at 3:30 AM
49° Friday 3:30 AM
Sunny at 6:30 AM
48° 6:30 AM
Sunny at 9:30 AM
58° 9:30 AM
Sunny at 12:30 PM
64° 12:30 PM
Sunny at 3:30 PM
64° Friday 3:30 PM
Clear night at 6:30 PM
57° 6:30 PM
Overcast night at 9:30 PM
54° 9:30 PM
Clear night at 12:30 AM
54° 12:30 AM
Mostly clear night at 3:30 AM
54° Saturday 3:30 AM
Sunny at 9:30 AM
52° 9:30 AM
Mostly sunny at 3:30 PM
63° 3:30 PM
Overcast night at 9:30 PM
71° 9:30 PM
Mostly cloudy night at 3:30 AM
62° Sunday 3:30 AM
Partly cloudy at 9:30 AM
63° 9:30 AM
Partly cloudy at 3:30 PM
66° 3:30 PM
Clear night at 9:30 PM
63° 9:30 PM
Clear night at 3:30 AM
57° Monday 3:30 AM
Mostly sunny at 9:30 AM
57° 9:30 AM
Light rain at 3:30 PM
59° 3:30 PM
Partly cloudy night at 9:30 PM
61° 9:30 PM
Partly cloudy night at 3:30 AM
57° Tuesday 3:30 AM
Partly cloudy at 9:30 AM
54° 9:30 AM
Overcast at 3:30 PM
57° 3:30 PM
Mostly clear night at 9:30 PM
59° 9:30 PM
Clear night at 3:30 AM
52° Wednesday 3:30 AM
Mostly sunny at 9:30 AM
46° 9:30 AM
Sunny at 3:30 PM
56° 3:30 PM
Clear night at 9:30 PM
59° 9:30 PM
Clear night at 3:30 AM
53° Thursday 3:30 AM
Sunny at 9:30 AM
52° 9:30 AM
Sunny at 3:30 PM
62° 3:30 PM
Mostly clear night at 9:30 PM
71° 9:30 PM
Mostly clear night at 3:30 AM
65° Friday 3:30 AM
Partly cloudy at 9:30 AM
68° 9:30 AM
Light rain at 3:30 PM
66° 3:30 PM
Clear night at 9:30 PM
63° 9:30 PM
Clear night at 3:30 AM
58° Saturday 3:30 AM
Mostly sunny at 9:30 AM
57° 9:30 AM
Partly cloudy at 3:30 PM
60° 3:30 PM
Clear night at 9:30 PM
61° 9:30 PM
Clear night at 3:30 AM
55° Sunday 3:30 AM
Sunny at 9:30 AM
53° 9:30 AM
Sunny at 3:30 PM
63° 3:30 PM
Overcast night at 9:30 PM
70° 9:30 PM
Mostly cloudy night at 3:30 AM
63° Monday 3:30 AM

AIR QUALITY FORECAST

Air Quality Forecast for Semaphore

Hourly forecast · Updated every 2 hours
Good
Nearest forecast value 1:30 PM
PM2.5 Fine particles Good 1,0µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 2,2µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 58,1µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,1µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Semaphore

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.
0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme
Today UV 4,1Moderate 😊Good
Tomorrow UV 5,5Moderate 🙂Fair
Tuesday UV 6,3High 🙂Fair
Wednesday UV 6,5High 🙂Fair
Thursday UV 6,6High 🙂Fair
Friday UV 6,0High Unavailable
Saturday UV 6,0High Unavailable
Hourly UV index today
2:00 PMUV 2,8 3:00 PMUV 1,5 4:00 PMUV 0,6 5:00 PMUV 0,1 6:00 PMUV 0,0 7:00 PMUV 0,0
Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Semaphore

Vertical axis: km/h · Horizontal axis: hours
Hourly wind speed Chart of sustained wind and maximum gusts in km/h. Today 1:30 PM 2:30 PM 3:30 PM 4:30 PM Today 5:30 PM 6:30 PM 7:30 PM 8:30 PM Today 9:30 PM 10:30 PM 11:30 PM 12:30 AM Tomorrow 1:30 AM 2:30 AM 3:30 AM 4:30 AM Tomorrow 5:30 AM 6:30 AM 7:30 AM 8:30 AM Tomorrow 9:30 AM 10:30 AM 11:30 AM 12:30 PM Tomorrow 1:30 PM 2:30 PM 3:30 PM 4:30 PM Tomorrow 5:30 PM 6:30 PM 7:30 PM 8:30 PM Tomorrow 9:30 PM 10:30 PM 11:30 PM 12:30 AM Tuesday 1:30 AM 2:30 AM 3:30 AM 4:30 AM Tuesday 5:30 AM 6:30 AM 7:30 AM 8:30 AM Tuesday 9:30 AM 10:30 AM 11:30 AM 12:30 PM Tuesday 1:30 PM 2:30 PM 3:30 PM 4:30 PM Tuesday 5:30 PM 6:30 PM 7:30 PM 8:30 PM Tuesday 9:30 PM 6:30 AM 9:30 AM 12:30 PM Wednesday 3:30 PM 6:30 PM 9:30 PM 12:30 AM Thursday 3:30 AM 6:30 AM 9:30 AM 12:30 PM Thursday 3:30 PM 6:30 PM 9:30 PM 12:30 AM Friday 3:30 AM 6:30 AM 9:30 AM 12:30 PM Friday 3:30 PM 6:30 PM 9:30 PM 12:30 AM Saturday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Sunday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Monday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Tuesday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Wednesday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Thursday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Friday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Saturday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Sunday 3:30 AM 9:30 AM 3:30 PM 9:30 PM Monday 3:30 AM
Sustained wind Max gusts
NIGHT SKY · SEMAPHORE, SOUTH AUSTRALIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:30 AM–5:30 AM.

99/100Best-hour score
BEST TIME TONIGHT 4:30 AM–5:30 AM Astronomical darkness: 7:24 PM–5:03 AM
Cloud cover 1% Real hourly forecast for the best viewing hour.
Moonlight 26% Waning Crescent · Moon about 7° above the horizon at the best viewing hour.
Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 15° high at the best hour.
Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.
Chance ≥1 meteor in 30 min31%
UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.
SEP 5–SEP 21
September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak
ACTIVE NOW
SEP 20–NOV 20
Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak
UPCOMING
OCT 2–NOV 7
OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak
UPCOMING
OCT 20–DEC 10
Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak
UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

Forecast data for Semaphore were last refreshed today at 12:58 PM. The current forecast period extends through 08/09/2026 at 10:30 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.