A slight drop in temperature is expected Tuesday and throughout the week, though highs will still be in the triple digits in the desert, according to the National Weather Service office in San Diego.

Forecasters expect Tuesday desert area west winds may reach 10 to 20 mph — becoming 20 to 30 mph with gusts to 45 mph in the afternoon. Night is expected to be mostly clear in the evening becoming partly cloudy, with lows from 76 to 85 degrees.

Highs Tuesday are forecast to be 74 to 79 near the coast, 81 to 84 inland, 86 to 91 in the western valleys, 80 to 90 in the mountains and 103 to 107 in the deserts.

Meanwhile, Tropical Storm Eugene was gaining strength off the coast of Baja California on Sunday and could bring clouds, humidity, thunderstorms and high surf to San Diego County later this week, forecasters said.

The surf forecast through Tuesday is a moderate-risk rip current, with surf height from 2 to 4 feet. General water temperatures will range from 69 to 72 degrees, forecasters said.

Drier air returns next weekend, leading to hotter days again inland well into next week, forecasters said.

City News Services contributed to this article.