Alphabet Inc. (Class C) (GOOG) Seasonality
Recurring seasonal patterns for GOOG — the calendar windows where Alphabet Inc. (Class C) has historically tended to rise or fall, with the win rate (how often it repeated) and average return for each, based on the last 10 years of price history.
GOOG seasonality at a glance
Over the last 10 years, GOOG's strongest seasonal window has been Jan 3 – Feb 2: it ended higher in 10 of 10 years (100% win rate) with an average return of +6.19% across a 30-day hold. On the weak side, GOOG has historically declined between Jun 10 – Jun 30, falling in 8 of 10 years (average -1.37%).
In total, our analysis finds 735 recurring seasonal windows for Alphabet Inc. (Class C) — 649 bullish and 86 bearish. The next high-win-rate window, Sep 17 – Oct 17, opens in 6 days. These figures describe historical behaviour only — not a forecast.
GOOG's upcoming & recent seasonal patterns
Holding period:10-day20-day30-dayOrdered by season — windows opening soon first, plus a couple of recently completed high-performers. Holding-period colors help you compare durations at a glance.
| Status | Seasonal window | Hold | Avg return | Win rate | This year |
|---|---|---|---|---|---|
| Completedended 20d ago | Jul 23 – Aug 22 | 30d | +1.97% | 80% | +7.35% |
| Completedended 38d ago | Jul 5 – Aug 4 | 30d | +3.82% | 90% | +5.38% |
| Upcomingin 6d | Sep 17 – Oct 17 | 30d | +1.64% | 80% | — |
| Upcomingin 7d | Sep 18 – Oct 18 | 30d | +1.68% | 80% | — |
| Upcomingin 9d | Sep 20 – Oct 20 | 30d | +1.33% | 80% | — |
| Upcomingin 10d | Sep 21 – Oct 21 | 30d | +2.26% | 80% | — |
| Upcomingin 12d | Sep 23 – Oct 23 | 30d | +2.51% | 80% | — |
Win rate = how often the pattern repeated in the same direction. Average return = the mean move across all analysed years. Past performance does not guarantee future results.
Explore GOOG seasonality in full
See the seasonal curve chart, filter by win rate and return, and track upcoming windows — free during beta.
GOOG seasonality FAQ
What has historically been the best month to buy GOOG stock?
Based on the last 10 years of price data, GOOG's strongest seasonal window starts in January: Jan 3 to Feb 2, which ended higher in 10 of 10 years (100% win rate) with an average return of +6.19%. Past seasonal patterns do not guarantee future performance.
What is GOOG's strongest seasonal pattern?
GOOG's highest-win-rate pattern in our data is the Jan 3 – Feb 2 window (30-day hold): up in 10 of the last 10 years with an average move of +6.19%.
When has GOOG historically performed worst?
GOOG's weakest recurring window has been Jun 10 to Jun 30, declining in 8 of 10 years with an average return of -1.37%.
How reliable are GOOG's seasonal patterns?
Each GOOG pattern is scored by its historical win rate — the share of the last 10 years it repeated in the same direction. GOOG currently shows 735 recurring windows (649 bullish, 86 bearish). Seasonality describes historical tendencies only; it is not a prediction, and past performance does not guarantee future results.
What is GOOG stock seasonality?
Seasonality is the tendency of a stock to perform in a similar way during the same period each year. By analysing Alphabet Inc. (Class C)'s price history across many years, SeasonalityX identifies recurring calendar windows — exact start and end dates — where GOOG has repeatedly risen (bullish) or fallen (bearish). Each pattern is scored by its win rate and average return so you can judge how reliable and how strong it has been.
Seasonality is one input among many — it works best alongside your own research and risk management. Learn more in our guide to seasonal analysis and the tutorials.