MozCast

Algorithm Tracking

Weather report for Google algorithm fluctuations

Overview

MozCast stands as one of the original and most accessible Google algorithm tracking tools, transforming complex SERP volatility data into an intuitive weather forecast interface. Developed by Moz in 2012, it monitors 10,000 carefully selected keywords daily to detect ranking fluctuations that signal algorithm updates. The tool's genius lies in its simplicity — instead of charts and percentages, you get a temperature reading and weather icon that instantly communicate whether Google's rankings are stable or turbulent.

Unlike comprehensive SEO platforms that bundle algorithm tracking with dozens of other features, MozCast does one thing exceptionally well. It focuses exclusively on broad volatility detection using a consistent methodology that's remained largely unchanged since launch. This consistency makes it particularly valuable for historical trend analysis and correlating ranking changes with known algorithm updates over the past decade.

The tool sits alongside Semrush Sensor and Panguin Tool as essential algorithm monitoring resources, but each serves slightly different purposes. MozCast excels at providing quick daily snapshots of overall SERP stability, making it ideal for routine monitoring rather than deep diagnostic work.

Score breakdown

Composite Score

29.3

#3 of 3 in Algorithm Tracking#229 of 508 overall

Feature Depth12.0

Ease of Use50.0

Data Quality0.0

Value for Money85.0

Integration0.0

Market Traction18.0

Our review

MozCast is Moz's free Google algorithm weather report that tracks daily fluctuations in Google search results. It provides a temperature reading indicating how turbulent Google rankings are on any given day, helping SEOs identify potential algorithm updates.

Pros

✓Free daily Google algorithm tracking
✓Simple visual interface
✓Historical data for identifying algorithm patterns
✓Trusted data from Moz

Cons

—Very limited feature — temperature reading only
—No detailed analysis of what changed
—No customization for specific niches

Best for

SEOs monitoring Google algorithm changesAgencies wanting quick algorithm volatility checksSEO professionals tracking ranking instability

Key features

Weather Report Interface

Displays SERP volatility using weather metaphors (sunny, partly cloudy, stormy) making algorithm changes intuitive to understand at a glance.

Temperature Scale

Uses a 0-140°F scale to quantify ranking volatility, with higher temperatures indicating more significant SERP fluctuations.

Feature Tracking

Monitors specific SERP features like featured snippets, local packs, and knowledge panels to identify which elements are experiencing changes.

Historical Data Access

Provides years of historical volatility data allowing you to correlate ranking drops with specific algorithm update periods.

Mobile vs Desktop Split

Tracks volatility separately for mobile and desktop SERPs, revealing device-specific algorithm impacts.

Pricing

Plan	Price	Includes
Free	$0	Daily SERP volatility tracking, weather forecast interface, historical data, mobile and desktop tracking

Price verified 2025-02-01 · USDView vendor pricing

FAQ

How accurate is MozCast for detecting Google algorithm updates?

MozCast tracks a static set of 10,000 keywords daily, making it reliable for spotting broad volatility patterns. However, it may miss niche-specific updates that don't affect its keyword set.

What temperature reading indicates a significant algorithm update?

Temperatures above 80°F typically indicate noteworthy volatility, while readings above 100°F suggest major algorithm changes. Normal daily fluctuation usually stays between 60-80°F.

Can MozCast help me understand why my rankings dropped?

MozCast shows when algorithm volatility occurred but doesn't diagnose specific ranking causes. You'll need to combine this data with your own analytics and other SEO tools for root cause analysis.

How often does MozCast update its data?

MozCast updates daily with fresh SERP data, typically posting new volatility readings each morning based on the previous day's search results.

Is MozCast data different from other algorithm trackers?

Yes, MozCast uses a unique keyword set and weather metaphor system. Semrush Sensor and other trackers use different methodologies, so comparing multiple sources gives better perspective.

Capabilities

AI Visibility Metrics

✓Position Ranking

✓Trend Tracking

—Alert System

✓Geo/Location Filter

Content & Optimization

—Content Editor

—Content Generation

—Site Audit

Traditional SEO

—Keyword Rank Tracking

✓Local Rank Tracking

✓SERP Features Tracking

—Keyword Research

Technical & Integrations

—API

—CSV Export

—Chrome Extension

—WordPress Plugin

—Open Source

Deployment: cloud

How does MozCast compare?

vs panguin-toolCompare →vs semrush-sensorCompare →

View all comparisons →

aiseo.is Score

29.3

#3 of 3 in Algorithm Tracking

Garrett SmithExpert reviewer

20+ yrs in SEO3+ yrs AI for SEO20K+ campaigns

Review Sentiment

🟠Reddit sentiment

mixed

4 threads in SEO, bigseo

Algorithm update trackingSERP volatility monitoringBrand dominance metricsUseful diagnostic tool

“Yeah, MozCast spiked on the 9th”
r/SEO

“The Mozcast data is showing that bigger brands are dominating more and more”
r/bigseo

🔵𝕏 sentiment

positive

10 posts

Reliable data source for SERP volatility trackingUsed alongside other SEO tools for monitoring Google updatesTrusted for tracking Google feature rollouts and domain badgesIndustry standard reference tool for algorithm change detection

“Google now shows 'official domain' badge in 88% brand searches 🏅 Source: MozCast Feb 1”
@e58479

“New SERP trend: AIOs aren't always on top 📊 From our MozCast data, we found: - 14% of AIOs rank below position 1 - 6% appear in P4 or lower - 26% of branded AIOs aren't in P1”
@getSTAT

Last updated Feb 2026

Quick Facts

CategoryAlgorithm Tracking

Starting priceFree

Pricing modelFreemium

Free tierYes

Founded2012

HQSeattle, WA

StageSeries-c+

Parent co.Moz

Websitemoz.com/mozcast

LinkedInProfile ↗

Twitter@Moz