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As of 04:52 EDT

Weather in Harbor Island, SC

79°Current weather

Harbor Island, Sunday, 9 August, 04:52

Overcast. Feels like 79°. High 89°, low 77°.

Pressure30.06 inHg
Wind1 mph S
Humidity94%
Visibility6.2 mi
Dew point77°
Mon, 1092° / 78°0.06Light rain
92 °Light rain

Harbor Island, Monday, 10 August

Light rain. High 92°, low 78°.

Pressure30.12 inHg
Wind7 mph SW
Humidity60%
Visibility6.2 mi
Dew point74°
Tue, 1193° / 80°0.06Light rain
93 °Light rain

Harbor Island, Tuesday, 11 August

Light rain. High 93°, low 80°.

Pressure30.03 inHg
Wind7.4 mph SW
Humidity52%
Visibility6.2 mi
Dew point71°
Wed, 1295° / 81°0Light rain
95 °Light rain

Harbor Island, Wednesday, 12 August

Light rain. High 95°, low 81°.

Pressure29.94 inHg
Wind9.9 mph W
Humidity51%
Visibility6.2 mi
Dew point72°
Thu, 1395° / 79°0.11Light rain
95 °Light rain

Harbor Island, Thursday, 13 August

Light rain. High 95°, low 79°.

Pressure29.91 inHg
Wind15.1 mph W
Humidity52%
Visibility—
Dew point72°
Fri, 1491° / 75°0.24Rain
91 °Rain

Harbor Island, Friday, 14 August

Rain. High 91°, low 75°.

Pressure30.03 inHg
Wind19.8 mph SW
Humidity60%
Visibility—
Dew point73°
Sat, 1588° / 77°0.63Rain
88 °Rain

Harbor Island, Saturday, 15 August

Rain. High 88°, low 77°.

Pressure30.12 inHg
Wind12 mph E
Humidity67%
Visibility—
Dew point75°
Sun, 1684° / 77°0.22Rain
84 °Rain

Harbor Island, Sunday, 16 August

Rain. High 84°, low 77°.

Pressure30.12 inHg
Wind11.7 mph SE
Humidity75%
Visibility—
Dew point73°
Mon, 1781° / 78°1.49Heavy rain
81 °Heavy rain

Harbor Island, Monday, 17 August

Heavy rain. High 81°, low 78°.

Pressure30.00 inHg
Wind22.2 mph W
Humidity84%
Visibility—
Dew point75°
Tue, 1886° / 76°0.26Light rain
86 °Light rain

Harbor Island, Tuesday, 18 August

Light rain. High 86°, low 76°.

Pressure29.94 inHg
Wind10.4 mph S
Humidity71%
Visibility—
Dew point73°
Wed, 1987° / 80°0.23Rain
87 °Rain

Harbor Island, Wednesday, 19 August

Rain. High 87°, low 80°.

Pressure29.97 inHg
Wind8.7 mph SE
Humidity63%
Visibility—
Dew point72°
Thu, 2089° / 79°0Clear
89 °Clear

Harbor Island, Thursday, 20 August

Clear. High 89°, low 79°.

Pressure30.00 inHg
Wind11.6 mph S
Humidity55%
Visibility—
Dew point70°
Fri, 2188° / 80°0Overcast
88 °Overcast

Harbor Island, Friday, 21 August

Overcast. High 88°, low 80°.

Pressure29.97 inHg
Wind10.7 mph SE
Humidity59%
Visibility—
Dew point71°
Sat, 2288° / 81°0.02Light rain
88 °Light rain

Harbor Island, Saturday, 22 August

Light rain. High 88°, low 81°.

Pressure29.91 inHg
Wind14.2 mph S
Humidity63%
Visibility—
Dew point73°
Sun, 2385° / 81°0Overcast
85 °Overcast

Harbor Island, Sunday, 23 August

Overcast. High 85°, low 81°.

Pressure29.97 inHg
Wind13.6 mph S
Humidity73%
Visibility—
Dew point75°
Mon, 2486° / 81°0.01Light rain
86 °Light rain

Harbor Island, Monday, 24 August

Light rain. High 86°, low 81°.

Pressure30.06 inHg
Wind11.9 mph S
Humidity66%
Visibility—
Dew point73°

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 Harbor Island, SC 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 Harbor Island, SC 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.