Monthly outlook for Southport, OR: average high 70.3°, average low 53.5°. That is 0.2° below the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 10 August (88°), the coolest 24 August (49.7°).
70.3°/53.5°
Average high / low
−0.2°
Below normal
0 / 1
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
71°
71°
+0°
19 August – 28 August
69.1°
70.3°
-0.7°
29 August – 7 September
at normal
70.2°
—
August records over 66 years
98.4°13 August 2002All-time high
46.9°5 August 2025All-time low
Climate normals and records are computed from the nearest reference point — Bunker Hill (4 mi).
Mon, 1088° / 53°0
88 °
Southport, Monday, 10 August
Clear. High 88°, low 53°.
Pressure30.06 inHg
Wind12.6 mph NW
Humidity51%
Visibility6.2 mi
Dew point50°
Tue, 1171° / 50°0
71 °
Southport, Tuesday, 11 August
Clear. High 71°, low 50°.
Pressure30.06 inHg
Wind12.7 mph NW
Humidity53%
Visibility6.2 mi
Dew point52°
Wed, 1268° / 55°0
68 °
Southport, Wednesday, 12 August
Clear. High 68°, low 55°.
Pressure30.00 inHg
Wind13.3 mph N
Humidity65%
Visibility6.2 mi
Dew point55°
Thu, 1368° / 53°0
68 °
Southport, Thursday, 13 August
Clear. High 68°, low 53°.
Pressure29.88 inHg
Wind12.2 mph N
Humidity62%
Visibility—
Dew point53°
Fri, 1467° / 54°0
67 °
Southport, Friday, 14 August
Overcast. High 67°, low 54°.
Pressure30.00 inHg
Wind9.8 mph NW
Humidity64%
Visibility—
Dew point54°
Sat, 1568° / 53°0
68 °
Southport, Saturday, 15 August
Mostly clear. High 68°, low 53°.
Pressure30.03 inHg
Wind9.1 mph NW
Humidity60%
Visibility—
Dew point53°
Sun, 1670° / 51°0
70 °
Southport, Sunday, 16 August
Mostly clear. High 70°, low 51°.
Pressure30.03 inHg
Wind8.1 mph SW
Humidity56%
Visibility—
Dew point51°
Mon, 1761° / 55°0.02
61 °
Southport, Monday, 17 August
Light rain. High 61°, low 55°.
Pressure30.06 inHg
Wind6.8 mph SW
Humidity88%
Visibility—
Dew point54°
Tue, 1866° / 57°0
66 °
Southport, Tuesday, 18 August
Overcast. High 66°, low 57°.
Pressure30.00 inHg
Wind5.5 mph W
Humidity70%
Visibility—
Dew point53°
Wed, 1973° / 59°0.01
73 °
Southport, Wednesday, 19 August
Light rain. High 73°, low 59°.
Pressure29.97 inHg
Wind7 mph W
Humidity62%
Visibility—
Dew point57°
Thu, 2067° / 54°0
67 °
Southport, Thursday, 20 August
Overcast. High 67°, low 54°.
Pressure30.00 inHg
Wind7.3 mph W
Humidity72%
Visibility—
Dew point56°
Fri, 2169° / 51°0
69 °
Southport, Friday, 21 August
Overcast. High 69°, low 51°.
Pressure30.00 inHg
Wind8.2 mph NW
Humidity63%
Visibility—
Dew point54°
Sat, 2268° / 53°0
68 °
Southport, Saturday, 22 August
Overcast. High 68°, low 53°.
Pressure30.09 inHg
Wind11 mph N
Humidity64%
Visibility—
Dew point55°
Sun, 2369° / 50°0
69 °
Southport, Sunday, 23 August
Partly cloudy. High 69°, low 50°.
Pressure30.06 inHg
Wind14.4 mph NW
Humidity57%
Visibility—
Dew point51°
Mon, 2468° / 50°0
68 °
Southport, Monday, 24 August
Overcast. High 68°, low 50°.
Pressure29.97 inHg
Wind8.9 mph NW
Humidity69%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2571° / 55°0.04
71 °
Southport, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.04 in
Chance of precipitation13%
Record high91° (2016)
Record low49° (2024)
Wed, 2671° / 55°0.02
71 °
Southport, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.02 in
Chance of precipitation10%
Record high84° (2016)
Record low49° (1976)
Thu, 2771° / 55°0.03
71 °
Southport, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.03 in
Chance of precipitation12%
Record high81° (2019)
Record low50° (2020)
Fri, 2871° / 56°0.02
71 °
Southport, Friday, 28 August
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.02 in
Chance of precipitation15%
Record high80° (2002)
Record low51° (1970)
Sat, 2970° / 56°0.03
70 °
Southport, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.03 in
Chance of precipitation15%
Record high85° (1987)
Record low49° (1966)
Sun, 3070° / 56°0.03
70 °
Southport, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high70°
Average low56°
Average precipitation0.03 in
Chance of precipitation15%
Record high91° (1987)
Record low50° (1966)
Mon, 3170° / 55°0.03
70 °
Southport, Monday, 31 August
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.03 in
Chance of precipitation12%
Record high85° (1987)
Record low50° (1985)
Tue, 0171° / 55°0.03
71 °
Southport, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.03 in
Chance of precipitation13%
Record high89° (1988)
Record low49° (1999)
Wed, 0271° / 56°0.02
71 °
Southport, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high71°
Average low56°
Average precipitation0.02 in
Chance of precipitation12%
Record high85° (2003)
Record low47° (2021)
Thu, 0371° / 55°0.01
71 °
Southport, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.01 in
Chance of precipitation10%
Record high88° (2011)
Record low46° (2021)
Fri, 0471° / 55°0.02
71 °
Southport, Friday, 4 September
Climate normal for this date — 60-year average.
Average high71°
Average low55°
Average precipitation0.02 in
Chance of precipitation10%
Record high90° (1973)
Record low46° (2021)
Sat, 0570° / 55°0.02
70 °
Southport, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.02 in
Chance of precipitation12%
Record high92° (2014)
Record low48° (1970)
Sun, 0670° / 55°0.01
70 °
Southport, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.01 in
Chance of precipitation8%
Record high90° (1981)
Record low46° (2023)
Mon, 0770° / 55°0.02
70 °
Southport, Monday, 7 September
Climate normal for this date — 60-year average.
Average high70°
Average low55°
Average precipitation0.02 in
Chance of precipitation12%
Record high81° (1969)
Record low49° (2018)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Southport, OR are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Southport, OR since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.