SAN DIEGO — Thursday afternoon high temperatures will be above seasonal norms.
- Coastal highs 87°-103°, normal around 74°.
- Inland highs 99°-108°, normal around 84°.
- Mountain highs 90°-101°, normal around 75°.
- Desert highs 107°-112°, normal around 95°.
At the beaches, water temperature is 66°-70° with a moderate rip current risk. Wave heights are 2'-4' from a south-southwest swell and a steep northwest swell. The UV index will peak at 7 (high).
Humidity in the County will be dry. Coastal areas will see dew points near the low 50s, inland around 30°, mountain and desert dew points will be around 20°.
FALL HEAT WAVE:
An Excessive Heat Warning has been issues for inland locations until 8 PM Thursday. Afternoon high temperatures can reach as high as 108° in the inland areas.
A Heat Advisory has been issued at the coast until 8 PM Thursday and inland from 8 PM Thursday until 8 PM Friday. Afternoon high temperatures will be in the upper 80s near the beaches. Inland temperatures on Friday between 97°-107° possible. Hot temperatures will increase the likelihood of heat related illnesses. Drink plenty of water and stay cool.
THE WEEK AHEAD:
The high pressure will break down Friday. Onshore flow will slowly increase, first bringing cooler temperatures to the coast on Friday. Temperatures remain above average as cooler temperatures seep inland over the weekend.
A weak trough of low pressure will increase onshore flow over the weekend. Some higher clouds could form overhead Sunday and into next week, helping with the cooling. Temperatures remain above average for the first half of the coming week.
Stronger troughing could form towards the end of next week. Temperatures could reach seasonal average by midweek next week then potentially drop to slightly below average. This will all depend on the positioning of the trough, which is not clear at this point.