Updated 16 Sep 2026 · recomputed nightly
Is August 2027 a good month to visit San Diego?
Busy — the typical August day in San Diego is busier than 72% of its year.
If you are coming for something that only happens in August, that is the trade. If not, February is quieter.
Calm · Lively · Busy · Packed rank a day against San Diego's own year — not a headcount.
August is one of San Diego's busiest months: warm and dry, around 25°C / 78°F, and Busy every day.
No — not if you want San Diego to yourself. Every one of August's 31 days in our window is Busy or Packed, and the typical day is Busy. It is crowded throughout. Expect around 25 °C by day, with rain on about 1 days. Public holidays in Canada add to it. Cruise ships call on 1 of the 31 days. No week of August is meaningfully quieter — the typical day is Busy throughout; pick by day instead. For similar weather with fewer people, come in September or October. The crush is at the zoo's gates at holiday mid-morning; the quiet is at Coronado's long sand. The calmest day is Sunday 1 August, the busiest Monday 9 August.
In short, worth it for the peak buzz, if you can take the crowds.
Among the 12 months we forecast for San Diego, August ranks 3rd for crowd pressure. Its heaviest day is Mon 9 Aug, busier than 83% of the year; its lightest is Sun 1 Aug at 72%.
Preparing pays off in a month like this: timed-entry tickets and pre-booked tours turn the queue time into sightseeing time. see the options →
An easy month to pack for — rain on 1 of 31 days.
Paper keeps working when the phone is flat and the signal is gone.
See San Diego guides →
The one thing you wear all day, every day of the trip.
See walking shoes →
How busy is San Diego in August?
Every day is Busy — the crowd level barely shifts.
Ships call on 1 of 31 days, a typical call day carrying at least 740 guests — real, but a secondary part of the crowd here; the season moves the needle more.
The month barely moves — every day lands between 72% and 83% of the year. Daylight runs about 13 hours.
Either side of it, September is much calmer.
The lightest days are the 1st, 3rd and 4th. Still busy — but the easiest of the month — 28 days share that level, so there is room to choose.
Sun 01 Aug Busy busier than 72% of days here
Record San Diego on Sun 1 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-01 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 02 Aug Busy busier than 81% of days here · Canada public holiday
Record San Diego on Mon 2 Aug 2027 is forecast Busy. Why: Canada public holiday. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-02 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 03 Aug Busy busier than 72% of days here
Record San Diego on Tue 3 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-03 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 04 Aug Busy busier than 72% of days here
Record San Diego on Wed 4 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-04 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 05 Aug Busy busier than 72% of days here
Record San Diego on Thu 5 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-05 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 06 Aug Busy busier than 72% of days here
Record San Diego on Fri 6 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-06 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 07 Aug Busy busier than 72% of days here
Record San Diego on Sat 7 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-07 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 08 Aug Busy busier than 72% of days here
Record San Diego on Sun 8 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-08 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 09 Aug Busy busier than 83% of days here · ⚓1
- Crystal Serenity — guest capacity 740 07:00–19:00
Record San Diego on Mon 9 Aug 2027 is forecast Busy. 1 cruise ship scheduled, at least 740 guests at double occupancy; ships in port 07:00–19:00. Ship-by-ship detail for the day, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-09 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 10 Aug Busy busier than 72% of days here
Record San Diego on Tue 10 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-10 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 11 Aug Busy busier than 72% of days here
Record San Diego on Wed 11 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-11 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 12 Aug Busy busier than 72% of days here
Record San Diego on Thu 12 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-12 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 13 Aug Busy busier than 72% of days here
Record San Diego on Fri 13 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-13 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 14 Aug Busy busier than 72% of days here
Record San Diego on Sat 14 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-14 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 15 Aug Busy busier than 72% of days here
Record San Diego on Sun 15 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-15 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 16 Aug Busy busier than 81% of days here · Canada public holiday
Record San Diego on Mon 16 Aug 2027 is forecast Busy. Why: Canada public holiday. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-16 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 17 Aug Busy busier than 72% of days here
Record San Diego on Tue 17 Aug 2027 is forecast Busy. The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-17 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 18 Aug Busy busier than 72% of days here
Record San Diego on Wed 18 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-18 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 19 Aug Busy busier than 72% of days here
Record San Diego on Thu 19 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-19 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 20 Aug Busy busier than 72% of days here
Record San Diego on Fri 20 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-20 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 21 Aug Busy busier than 72% of days here
Record San Diego on Sat 21 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-21 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 22 Aug Busy busier than 72% of days here
Record San Diego on Sun 22 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-22 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 23 Aug Busy busier than 72% of days here
Record San Diego on Mon 23 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-23 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 24 Aug Busy busier than 72% of days here
Record San Diego on Tue 24 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-24 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Wed 25 Aug Busy busier than 72% of days here
Record San Diego on Wed 25 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-25 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Thu 26 Aug Busy busier than 72% of days here
Record San Diego on Thu 26 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-26 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Fri 27 Aug Busy busier than 72% of days here
Record San Diego on Fri 27 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-27 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sat 28 Aug Busy busier than 72% of days here
Record San Diego on Sat 28 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-28 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Sun 29 Aug Busy busier than 72% of days here
Record San Diego on Sun 29 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-29 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Mon 30 Aug Busy busier than 72% of days here
Record San Diego on Mon 30 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-30 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Tue 31 Aug Busy busier than 72% of days here
Record San Diego on Tue 31 Aug 2027 is forecast Busy. Nearest calmer day: Wed 1 Sep (Lively). The day in full, the year at a glance, and what's worth booking ahead: https://avoid-crowds.com/san-diego/#d-2027-08-31 (Avoid-Crowds, as of 16 Sep 2026; recomputed nightly.)
Which week of August is quietest in San Diego?
No week of August is meaningfully quieter — the typical day is Busy throughout; pick by day instead.
Can't move the dates? How to avoid the worst crowds
- On the busy days, the walk-up queues for the big sights are the biggest time-sink — a timed-entry ticket skips them, which is where a busy month is won or lost.
Travelling on a busy day?
Timed-entry and skip-the-line tickets turn queue time into sightseeing time — sort them before you fly.
August weather in San Diego
Comfortably warm — around 25°C / 78°F, easy shirtsleeve weather, with rain on only about 1 days.
Book beds and the big-ticket sights well ahead, and start your days by eight — in a month this full, the early hours are the only uncrowded ones.
More about San Diego in August
Based on: United States' public holidays · the official airport-arrivals pattern (BTS T-100, measured 2023–2025; airport-arrivals proxy for visitor volume) · five years of weather records (2019–2023) · confirmed event dates · the published cruise schedule
Every figure is recomputed nightly from real cruise schedules, public and school holidays, and long-run climate normals. Gaps are shown, not filled.
